Vulnerability-Lookup

RHSA-2026:9228

Vulnerability from csaf_redhat - Published: 2026-04-21 07:26 - Updated: 2026-04-23 23:44

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Important

Notes

Topic: An update for Red Hat Hardened Images RPMs is now available.

Details: This update includes the following RPMs: python3.14: * python-unversioned-command-3.14.4-2.hum1 (noarch) * python3-3.14.4-2.hum1 (aarch64, x86_64) * python3-debug-3.14.4-2.hum1 (aarch64, x86_64) * python3-devel-3.14.4-2.hum1 (aarch64, x86_64) * python3-idle-3.14.4-2.hum1 (aarch64, x86_64) * python3-libs-3.14.4-2.hum1 (aarch64, x86_64) * python3-test-3.14.4-2.hum1 (aarch64, x86_64) * python3-tkinter-3.14.4-2.hum1 (aarch64, x86_64) * python3.14-freethreading-3.14.4-2.hum1 (aarch64, x86_64) * python3.14-freethreading-debug-3.14.4-2.hum1 (aarch64, x86_64) * python3.14-freethreading-devel-3.14.4-2.hum1 (aarch64, x86_64) * python3.14-freethreading-idle-3.14.4-2.hum1 (aarch64, x86_64) * python3.14-freethreading-libs-3.14.4-2.hum1 (aarch64, x86_64) * python3.14-freethreading-test-3.14.4-2.hum1 (aarch64, x86_64) * python3.14-freethreading-tkinter-3.14.4-2.hum1 (aarch64, x86_64) * python3.14-3.14.4-2.hum1.src (src)

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2025-15366

A flaw was found in the imaplib module in the Python standard library. The imaplib module does not reject control characters, such as newlines, in user-controlled input passed to IMAP commands. This issue allows an attacker to inject additional commands to be executed in the IMAP server.

7.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')

Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ https://access.redhat.com/errata/RHSA-2026:9228

Workaround To mitigate this vulnerability, ensure that no data passed to the imaplib module contains newline or carriage return characters.

CVE-2026-1502

A flaw was found in Python. This vulnerability allows for the injection of extra information into HTTP communication. Specifically, the system does not properly prevent special characters (carriage return and line feed) from being included in HTTP client proxy tunnel headers or host fields.

4.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N

CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')

Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ https://access.redhat.com/errata/RHSA-2026:9228

Workaround Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

CVE-2026-4786

A flaw was found in the Python webbrowser.open() API. If a specially crafted URL containing "%action" is processed, an attacker could bypass a previous mitigation for CVE-2026-4519. This bypass allows for command injection into the underlying shell, potentially leading to arbitrary code execution.

7.1 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L

CWE-88 - Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ https://access.redhat.com/errata/RHSA-2026:9228

CVE-2026-5713

A flaw was found in Python. A malicious Python process could exploit the "profiling.sampling" module and "asyncio introspection capabilities" to read and write memory addresses within a privileged process. This vulnerability occurs when the privileged process connects to the malicious process via its remote debugging feature, potentially leading to information disclosure and arbitrary code execution. Successful exploitation requires repeated connections, which may cause instability in the connecting process.

6.0 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N

CWE-822 - Untrusted Pointer Dereference

Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ https://access.redhat.com/errata/RHSA-2026:9228

CVE-2026-6100

A flaw was found in Python's decompression modules, including `lzma.LZMADecompressor`, `bz2.BZ2Decompressor`, and `gzip.GzipFile`. This vulnerability, a use-after-free, can occur if a program attempts to re-use a decompression object after a memory allocation error, especially when the system is experiencing high memory usage. Exploitation of this flaw could potentially allow an attacker to execute arbitrary code or access sensitive data. The vulnerability is only present if the program re-uses decompressor instances across multiple decompression calls even after a `MemoryError` is raised during decompression. Using the helper functions to one-shot decompress data such as `lzma.decompress()`, `bz2.decompress()`, `gzip.decompress()`, and `zlib.decompress()` are not affected as a new decompressor instance is used per call. If the decompressor instance is not re-used after an error condition, this usage is similarly not vulnerable.

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-825 - Expired Pointer Dereference

Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ https://access.redhat.com/errata/RHSA-2026:9228

References

URL

Category

	https://access.redhat.com/errata/RHSA-2026:9228	self
	https://images.redhat.com/	external
	https://access.redhat.com/security/cve/CVE-2026-4786	external
	https://access.redhat.com/security/updates/classi…	external
	https://access.redhat.com/security/cve/CVE-2026-5713	external
	https://access.redhat.com/security/cve/CVE-2026-6100	external
	https://access.redhat.com/security/cve/CVE-2026-1502	external
	https://access.redhat.com/security/cve/CVE-2025-15366	external
	https://security.access.redhat.com/data/csaf/v2/a…	self
	https://access.redhat.com/security/cve/CVE-2025-15366	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2431368	external
	https://www.cve.org/CVERecord?id=CVE-2025-15366	external
	https://nvd.nist.gov/vuln/detail/CVE-2025-15366	external
	https://github.com/python/cpython/issues/143921	external
	https://github.com/python/cpython/pull/143922	external
	https://mail.python.org/archives/list/security-an…	external
	https://access.redhat.com/security/cve/CVE-2026-1502	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2457409	external
	https://www.cve.org/CVERecord?id=CVE-2026-1502	external
	https://nvd.nist.gov/vuln/detail/CVE-2026-1502	external
	https://github.com/python/cpython/commit/05ed7ce7…	external
	https://github.com/python/cpython/issues/146211	external
	https://github.com/python/cpython/pull/146212	external
	https://mail.python.org/archives/list/security-an…	external
	https://access.redhat.com/security/cve/CVE-2026-4786	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2458049	external
	https://www.cve.org/CVERecord?id=CVE-2026-4786	external
	https://nvd.nist.gov/vuln/detail/CVE-2026-4786	external
	https://github.com/python/cpython/issues/148169	external
	https://github.com/python/cpython/pull/148170	external
	https://mail.python.org/archives/list/security-an…	external
	https://access.redhat.com/security/cve/CVE-2026-5713	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2458239	external
	https://www.cve.org/CVERecord?id=CVE-2026-5713	external
	https://nvd.nist.gov/vuln/detail/CVE-2026-5713	external
	https://github.com/python/cpython/issues/148178	external
	https://github.com/python/cpython/pull/148187	external
	https://mail.python.org/archives/list/security-an…	external
	https://access.redhat.com/security/cve/CVE-2026-6100	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2457932	external
	https://www.cve.org/CVERecord?id=CVE-2026-6100	external
	https://nvd.nist.gov/vuln/detail/CVE-2026-6100	external
	https://github.com/python/cpython/commit/6a5f79c8…	external
	https://github.com/python/cpython/commit/8fc66aef…	external
	https://github.com/python/cpython/commit/c3cf71c3…	external
	https://github.com/python/cpython/issues/148395	external
	https://github.com/python/cpython/pull/148396	external
	https://mail.python.org/archives/list/security-an…	external

JSON

To clipboard

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          "category": "workaround",
          "details": "To mitigate this vulnerability, ensure that no data passed to the imaplib module contains newline or carriage return characters.",
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            "Red Hat Hardened Images:python3-14-main@noarch",
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        }
      ],
      "scores": [
        {
          "cvss_v3": {
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            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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            "Red Hat Hardened Images:python3-14-main@noarch",
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            "Red Hat Hardened Images:python3-14-main@x86_64"
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "cpython: IMAP command injection in user-controlled commands"
    },
    {
      "cve": "CVE-2026-1502",
      "cwe": {
        "id": "CWE-93",
        "name": "Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027)"
      },
      "discovery_date": "2026-04-10T19:01:07.715197+00:00",
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          "product_ids": [
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        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2457409"
        }
      ],
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        {
          "category": "description",
          "text": "A flaw was found in Python. This vulnerability allows for the injection of extra information into HTTP communication. Specifically, the system does not properly prevent special characters (carriage return and line feed) from being included in HTTP client proxy tunnel headers or host fields.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "python: Python: HTTP header injection via CR/LF in proxy tunnel headers",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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          "category": "self",
          "summary": "Canonical URL",
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        },
        {
          "category": "external",
          "summary": "RHBZ#2457409",
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        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-1502",
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        {
          "category": "external",
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        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/commit/05ed7ce7ae9e17c23a04085b2539fe6d6d3cef69",
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          "summary": "https://github.com/python/cpython/pull/146212",
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        },
        {
          "category": "external",
          "summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/2IVPAEQWUJBCTQZEJEVTYCIKSMQPGRZ3/",
          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/2IVPAEQWUJBCTQZEJEVTYCIKSMQPGRZ3/"
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      ],
      "release_date": "2026-04-10T17:54:44.121000+00:00",
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          "url": "https://access.redhat.com/errata/RHSA-2026:9228"
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            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
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          },
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            "Red Hat Hardened Images:python3-14-main@noarch",
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            "Red Hat Hardened Images:python3-14-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "python: Python: HTTP header injection via CR/LF in proxy tunnel headers"
    },
    {
      "cve": "CVE-2026-4786",
      "cwe": {
        "id": "CWE-88",
        "name": "Improper Neutralization of Argument Delimiters in a Command (\u0027Argument Injection\u0027)"
      },
      "discovery_date": "2026-04-13T22:01:38.006388+00:00",
      "flags": [
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          "label": "vulnerable_code_not_present",
          "product_ids": [
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          ]
        }
      ],
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2458049"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Python webbrowser.open() API. If a specially crafted URL containing \"%action\" is processed, an attacker could bypass a previous mitigation for CVE-2026-4519. This bypass allows for command injection into the underlying shell, potentially leading to arbitrary code execution.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "python: cpython: Python: Arbitrary code execution via command injection in webbrowser.open() API",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This flaw in the Python `webbrowser.open()` API allows for command injection and arbitrary code execution when processing specially crafted URLs containing \"%action\". This bypasses a previous mitigation for CVE-2026-4519.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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          "Red Hat Hardened Images:python3-14-main@src",
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        "known_not_affected": [
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      "references": [
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          "summary": "Canonical URL",
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        },
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          "category": "external",
          "summary": "RHBZ#2458049",
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        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-4786",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-4786"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-4786",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4786"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/issues/148169",
          "url": "https://github.com/python/cpython/issues/148169"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/pull/148170",
          "url": "https://github.com/python/cpython/pull/148170"
        },
        {
          "category": "external",
          "summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/JQDUNJVB4AQNTJECSUKOBDU3XCJIPSE5/",
          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/JQDUNJVB4AQNTJECSUKOBDU3XCJIPSE5/"
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      ],
      "release_date": "2026-04-13T21:52:19.036000+00:00",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2026-04-21T07:26:49+00:00",
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          "product_ids": [
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            "Red Hat Hardened Images:python3-14-main@src",
            "Red Hat Hardened Images:python3-14-main@x86_64"
          ],
          "restart_required": {
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          "url": "https://access.redhat.com/errata/RHSA-2026:9228"
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            "Red Hat Hardened Images:python3-14-main@x86_64"
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            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
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            "userInteraction": "REQUIRED",
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            "Red Hat Hardened Images:python3-14-main@noarch",
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            "Red Hat Hardened Images:python3-14-main@x86_64"
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        }
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      "threats": [
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      ],
      "title": "python: cpython: Python: Arbitrary code execution via command injection in webbrowser.open() API"
    },
    {
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          "product_ids": [
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          "system_name": "Red Hat Bugzilla ID",
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      ],
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          "category": "description",
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          "title": "Vulnerability description"
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          "text": "python: Python: Information disclosure and arbitrary code execution via remote debugging with a malicious process.",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "Red Hat Hardened Images:python3-14-main@src",
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        "known_not_affected": [
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          "category": "external",
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        {
          "category": "external",
          "summary": "https://github.com/python/cpython/issues/148178",
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          "category": "external",
          "summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/OG4RHARYSNIE22GGOMVMCRH76L5HKPLM/",
          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/OG4RHARYSNIE22GGOMVMCRH76L5HKPLM/"
        }
      ],
      "release_date": "2026-04-14T15:11:51.122000+00:00",
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          "category": "vendor_fix",
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            "Red Hat Hardened Images:python3-14-main@src",
            "Red Hat Hardened Images:python3-14-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:9228"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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            "Red Hat Hardened Images:python3-14-main@noarch",
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            "Red Hat Hardened Images:python3-14-main@x86_64"
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        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 6.0,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
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            "Red Hat Hardened Images:python3-14-main@x86_64"
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        }
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          "category": "impact",
          "details": "Moderate"
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      ],
      "title": "python: Python: Information disclosure and arbitrary code execution via remote debugging with a malicious process."
    },
    {
      "cve": "CVE-2026-6100",
      "cwe": {
        "id": "CWE-825",
        "name": "Expired Pointer Dereference"
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      "discovery_date": "2026-04-13T18:01:31.970255+00:00",
      "flags": [
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          "label": "vulnerable_code_not_present",
          "product_ids": [
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        }
      ],
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2457932"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Python\u0027s decompression modules, including `lzma.LZMADecompressor`, `bz2.BZ2Decompressor`, and `gzip.GzipFile`. This vulnerability, a use-after-free, can occur if a program attempts to re-use a decompression object after a memory allocation error, especially when the system is experiencing high memory usage. Exploitation of this flaw could potentially allow an attacker to execute arbitrary code or access sensitive data. The vulnerability is only present if the program re-uses decompressor instances across multiple decompression calls even after a `MemoryError` is raised during decompression. Using the helper functions to one-shot decompress data such as `lzma.decompress()`, `bz2.decompress()`, `gzip.decompress()`, and `zlib.decompress()` are not affected as a new decompressor instance is used per call. If the decompressor instance is not re-used after an error condition, this usage is similarly not vulnerable.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "python: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "The severity of this flaw is somewhat mitigated on Red Hat platforms. By default processes are not executed with root user privilege and are limited in their scope which in turn limits the impact of this flaw.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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          "Red Hat Hardened Images:python3-14-main@src",
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-6100"
        },
        {
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          "summary": "RHBZ#2457932",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2457932"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-6100",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-6100"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-6100",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6100"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/commit/6a5f79c8d7bbf22b083b240910c7a8781a59437d",
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          "summary": "https://github.com/python/cpython/commit/c3cf71c3366fe49acb776a639405c0eea6169c20",
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        {
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          "summary": "https://github.com/python/cpython/issues/148395",
          "url": "https://github.com/python/cpython/issues/148395"
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          "summary": "https://github.com/python/cpython/pull/148396",
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        {
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          "summary": "https://mail.python.org/archives/list/security-announce@python.org/thread/HTWB2Z6KT5QQX4RYEZAFININDHNOSIF3/",
          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/HTWB2Z6KT5QQX4RYEZAFININDHNOSIF3/"
        }
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      "remediations": [
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          "category": "vendor_fix",
          "date": "2026-04-21T07:26:49+00:00",
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          "restart_required": {
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}

CVE-2026-6100 (GCVE-0-2026-6100)

Vulnerability from cvelistv5 – Published: 2026-04-13 17:15 – Updated: 2026-04-14 14:30

Title

Use-after-free in lzma.LZMADecompressor, bz2.BZ2Decompressor, and gzip.GzipFile after re-use under memory pressure

Summary

Use-after-free (UAF) was possible in the `lzma.LZMADecompressor`, `bz2.BZ2Decompressor`, and `gzip.GzipFile` when a memory allocation fails with a `MemoryError` and the decompression instance is re-used. This scenario can be triggered if the process is under memory pressure. The fix cleans up the dangling pointer in this specific error condition. The vulnerability is only present if the program re-uses decompressor instances across multiple decompression calls even after a `MemoryError` is raised during decompression. Using the helper functions to one-shot decompress data such as `lzma.decompress()`, `bz2.decompress()`, `gzip.decompress()`, and `zlib.decompress()` are not affected as a new decompressor instance is used per call. If the decompressor instance is not re-used after an error condition, this usage is similarly not vulnerable.

Severity ?

9.1 (Critical)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CWE

CWE-416 - Use after free
CWE-787 - Out-of-bounds write

Assigner

PSF

References

URL

Tags

	https://github.com/python/cpython/pull/148396	patch
	https://mail.python.org/archives/list/security-an…	vendor-advisory
	https://github.com/python/cpython/issues/148395	issue-tracking
	https://github.com/python/cpython/commit/6a5f79c8…	patch
	https://github.com/python/cpython/commit/8fc66aef…	patch
	https://github.com/python/cpython/commit/c3cf71c3…	patch
	https://github.com/python/cpython/commit/47128e64…	patch
	https://github.com/python/cpython/commit/e20c6c96…	patch

Impacted products

	Vendor	Product	Version
	Python Software Foundation	CPython	Affected: 0 , < 3.15.0 (python)

Credits

Ryan Hileman Stan Ulbrych Seth Larson Stan Ulbrych Ryan Hileman

Show details on NVD website

JSON

To clipboard

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CVE-2025-15366 (GCVE-0-2025-15366)

Vulnerability from cvelistv5 – Published: 2026-01-20 21:40 – Updated: 2026-02-26 14:44

Title

IMAP command injection in user-controlled commands

Summary

The imaplib module, when passed a user-controlled command, can have additional commands injected using newlines. Mitigation rejects commands containing control characters.

Severity ?

5.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

CWE

CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')

Assigner

PSF

References

URL

Tags

	https://github.com/python/cpython/issues/143921	issue-tracking
	https://github.com/python/cpython/pull/143922	patch
	https://mail.python.org/archives/list/security-an…	vendor-advisory
	https://github.com/python/cpython/commit/6262704b…	patch

Impacted products

	Vendor	Product	Version
	Python Software Foundation	CPython	Affected: 0 , < 3.15.0a6 (python)

Credits

Omar M. Hasan

Show details on NVD website

JSON

To clipboard

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CVE-2026-4786 (GCVE-0-2026-4786)

Vulnerability from cvelistv5 – Published: 2026-04-13 21:52 – Updated: 2026-04-14 14:30

Title

Incomplete mitigation of CVE-2026-4519, %action expansion for command injection to webbrowser.open()

Summary

Mitgation of CVE-2026-4519 was incomplete. If the URL contained "%action" the mitigation could be bypassed for certain browser types the "webbrowser.open()" API could have commands injected into the underlying shell. See CVE-2026-4519 for details.

Severity ?

7 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CWE

CWE-77

Assigner

PSF

References

URL

Tags

	https://github.com/python/cpython/pull/148170	patch
	https://github.com/python/cpython/issues/148169	issue-tracking
	https://mail.python.org/archives/list/security-an…	vendor-advisory
	https://github.com/python/cpython/commit/c5767a72…	patch
	https://github.com/python/cpython/commit/d22922c8…	patch
	https://github.com/python/cpython/commit/f4654824…	patch

Impacted products

	Vendor	Product	Version
	Python Software Foundation	CPython	Affected: 0 , < 3.15.0 (python)

Credits

an7y Seth Larson Stan Ulbrych

Show details on NVD website

JSON

To clipboard

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CVE-2026-1502 (GCVE-0-2026-1502)

Vulnerability from cvelistv5 – Published: 2026-04-10 17:54 – Updated: 2026-04-21 20:18

Title

HTTP client proxy tunnel headers not validated for CR/LF

Summary

CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.

Severity ?

5.7 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Assigner

PSF

References

URL

Tags

	https://github.com/python/cpython/pull/146212	patch
	https://github.com/python/cpython/issues/146211	issue-tracking
	https://mail.python.org/archives/list/security-an…	vendor-advisory
	https://github.com/python/cpython/commit/05ed7ce7…	patch
	https://github.com/python/cpython/commit/b1cf9016…	patch

Impacted products

	Vendor	Product	Version
	Python Software Foundation	CPython	Affected: 0 , < 3.15.0 (python)

Credits

senseicat Seth Larson

Show details on NVD website

JSON

To clipboard

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CVE-2026-5713 (GCVE-0-2026-5713)

Vulnerability from cvelistv5 – Published: 2026-04-14 15:11 – Updated: 2026-04-15 17:24

Title

Out-of-bounds read/write during remote profiling and asyncio process introspection when connecting to malicious target

Summary

The "profiling.sampling" module (Python 3.15+) and "asyncio introspection capabilities" (3.14+, "python -m asyncio ps" and "python -m asyncio pstree") features could be used to read and write addresses in a privileged process if that process connected to a malicious or "infected" Python process via the remote debugging feature. This vulnerability requires persistently and repeatedly connecting to the process to be exploited, even after the connecting process crashes with high likelihood due to ASLR.

Severity ?

5.3 (Medium)


                        
                          CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CWE

CWE-121 - Stack-based buffer overflow
CWE-125 - Out-of-bounds read

Assigner

PSF

References

URL

Tags

	https://github.com/python/cpython/pull/148187	patch
	https://github.com/python/cpython/issues/148178	issue-tracking
	https://mail.python.org/archives/list/security-an…	vendor-advisory
	https://github.com/python/cpython/commit/289fd2c9…	patch

Impacted products

	Vendor	Product	Version
	Python Software Foundation	CPython	Affected: 3.14.0 , < 3.15.0 (python)

Credits

Nicholas Gould (https://github.com/gouldnicholas) Pablo Galindo Salgado Pablo Galindo Salgado

Show details on NVD website

JSON

To clipboard

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Tags

Taxonomy of the tags.

All sightings related to this event Export sightings related to this event

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

RHSA-2026:9228

CVE-2026-6100 (GCVE-0-2026-6100)

CVE-2025-15366 (GCVE-0-2025-15366)

CVE-2026-4786 (GCVE-0-2026-4786)

CVE-2026-1502 (GCVE-0-2026-1502)

CVE-2026-5713 (GCVE-0-2026-5713)

Tags

Sightings

Nomenclature