RHSA-2026:10117

Vulnerability from csaf_redhat - Published: 2026-04-23 11:30 - Updated: 2026-04-23 14:47
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: python3.13: * python3.13-3.13.13-1.1.hum1 (aarch64, x86_64) * python3.13-debug-3.13.13-1.1.hum1 (aarch64, x86_64) * python3.13-devel-3.13.13-1.1.hum1 (aarch64, x86_64) * python3.13-freethreading-3.13.13-1.1.hum1 (aarch64, x86_64) * python3.13-freethreading-debug-3.13.13-1.1.hum1 (aarch64, x86_64) * python3.13-idle-3.13.13-1.1.hum1 (aarch64, x86_64) * python3.13-libs-3.13.13-1.1.hum1 (aarch64, x86_64) * python3.13-test-3.13.13-1.1.hum1 (aarch64, x86_64) * python3.13-tkinter-3.13.13-1.1.hum1 (aarch64, x86_64) * python3.13-3.13.13-1.1.hum1.src (src) Security Fix(es): python3.13: * CVE-2026-1502 * CVE-2026-4786 * CVE-2026-6100
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-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-2026:10117
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-2026:10117
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-2026-6100

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-2026:10117
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.
References
https://access.redhat.com/errata/RHSA-2026:10117 self
https://access.redhat.com/security/cve/CVE-2026-1502 external
https://access.redhat.com/security/cve/CVE-2026-4786 external
https://access.redhat.com/security/cve/CVE-2026-6100 external
https://access.redhat.com/security/updates/classi… external
https://images.redhat.com/ external
https://security.access.redhat.com/data/csaf/v2/a… self
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-2026-6100 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
To clipboard 

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          "details": "Moderate"
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          "date": "2026-04-23T11:30:45+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:python3-13-main@aarch64",
            "Red Hat Hardened Images:python3-13-main@src",
            "Red Hat Hardened Images:python3-13-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:10117"
        },
        {
          "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.",
          "product_ids": [
            "Red Hat Hardened Images:python3-13-main@aarch64",
            "Red Hat Hardened Images:python3-13-main@src",
            "Red Hat Hardened Images:python3-13-main@x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:python3-13-main@aarch64",
            "Red Hat Hardened Images:python3-13-main@src",
            "Red Hat Hardened Images:python3-13-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "python: cpython: Python: Arbitrary code execution via command injection in webbrowser.open() API"
    },
    {
      "cve": "CVE-2026-6100",
      "cwe": {
        "id": "CWE-825",
        "name": "Expired Pointer Dereference"
      },
      "discovery_date": "2026-04-13T18:01:31.970255+00:00",
      "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": {
        "fixed": [
          "Red Hat Hardened Images:python3-13-main@aarch64",
          "Red Hat Hardened Images:python3-13-main@src",
          "Red Hat Hardened Images:python3-13-main@x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-6100"
        },
        {
          "category": "external",
          "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",
          "url": "https://github.com/python/cpython/commit/6a5f79c8d7bbf22b083b240910c7a8781a59437d"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/commit/8fc66aef6d7b3ae58f43f5c66f9366cc8cbbfcd2",
          "url": "https://github.com/python/cpython/commit/8fc66aef6d7b3ae58f43f5c66f9366cc8cbbfcd2"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/commit/c3cf71c3366fe49acb776a639405c0eea6169c20",
          "url": "https://github.com/python/cpython/commit/c3cf71c3366fe49acb776a639405c0eea6169c20"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/issues/148395",
          "url": "https://github.com/python/cpython/issues/148395"
        },
        {
          "category": "external",
          "summary": "https://github.com/python/cpython/pull/148396",
          "url": "https://github.com/python/cpython/pull/148396"
        },
        {
          "category": "external",
          "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/"
        }
      ],
      "release_date": "2026-04-13T17:15:47.606000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-04-23T11:30:45+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:python3-13-main@aarch64",
            "Red Hat Hardened Images:python3-13-main@src",
            "Red Hat Hardened Images:python3-13-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:10117"
        },
        {
          "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.",
          "product_ids": [
            "Red Hat Hardened Images:python3-13-main@aarch64",
            "Red Hat Hardened Images:python3-13-main@src",
            "Red Hat Hardened Images:python3-13-main@x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:python3-13-main@aarch64",
            "Red Hat Hardened Images:python3-13-main@src",
            "Red Hat Hardened Images:python3-13-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "python: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules"
    }
  ]
}


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Taxonomy of the tags.




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.