Vulnerability-Lookup

RHSA-2026:48238

Vulnerability from csaf_redhat - Published: 2026-07-29 21:38 - Updated: 2026-08-18 15:42

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Severity

Low

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-3.14.6-2.2.hum1 (noarch) * python3-3.14.6-2.2.hum1 (aarch64, x86_64) * python3-debug-3.14.6-2.2.hum1 (aarch64, x86_64) * python3-devel-3.14.6-2.2.hum1 (aarch64, x86_64) * python3-idle-3.14.6-2.2.hum1 (aarch64, x86_64) * python3-libs-3.14.6-2.2.hum1 (aarch64, x86_64) * python3-test-3.14.6-2.2.hum1 (aarch64, x86_64) * python3-tkinter-3.14.6-2.2.hum1 (aarch64, x86_64) * python3.14-freethreading-3.14.6-2.2.hum1 (aarch64, x86_64) * python3.14-freethreading-debug-3.14.6-2.2.hum1 (aarch64, x86_64) * python3.14-freethreading-devel-3.14.6-2.2.hum1 (aarch64, x86_64) * python3.14-freethreading-idle-3.14.6-2.2.hum1 (aarch64, x86_64) * python3.14-freethreading-libs-3.14.6-2.2.hum1 (aarch64, x86_64) * python3.14-freethreading-test-3.14.6-2.2.hum1 (aarch64, x86_64) * python3.14-freethreading-tkinter-3.14.6-2.2.hum1 (aarch64, x86_64) * python3.14-3.14.6-2.2.hum1.src (src) Security Fix(es): python3.14: * CVE-2026-6879

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-2026-6879

A flaw was found in Python's xml.etree.ElementPath component. This vulnerability can lead to a denial of service (DoS) when processing specially crafted XML documents. Specifically, certain XPath index predicates used with functions like Element.findall() and Element.iterfind() can cause the processing time to increase quadratically with the size of the input, making the system unresponsive. A remote attacker could exploit this by providing a malicious XML file, potentially disrupting service availability.

2.2 (Low)


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

CWE-770 - Allocation of Resources Without Limits or Throttling

Affected products

Fixed 4 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:python3-14-main@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:python3-14-main@noarch	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:python3-14-main@src	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:python3-14-main@x86_64	—	Vendor Fix fix

Threats

Impact Low

References

13 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:48238	self
https://access.redhat.com/security/cve/CVE-2026-6879	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-2026-6879	self
https://bugzilla.redhat.com/show_bug.cgi?id=2508122	external
https://www.cve.org/CVERecord?id=CVE-2026-6879	external
https://nvd.nist.gov/vuln/detail/CVE-2026-6879	external
https://github.com/python/cpython/commit/2ffab083…	external
https://github.com/python/cpython/issues/152674	external
https://github.com/python/cpython/pull/152676	external
https://mail.python.org/archives/list/security-an…	external

JSON

To clipboard

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      },
      "discovery_date": "2026-07-28T17:34:14.787326+00:00",
      "ids": [
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          "text": "2508122"
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      ],
      "notes": [
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          "category": "description",
          "text": "A flaw was found in Python\u0027s xml.etree.ElementPath component. This vulnerability can lead to a denial of service (DoS) when processing specially crafted XML documents. Specifically, certain XPath index predicates used with functions like Element.findall() and Element.iterfind() can cause the processing time to increase quadratically with the size of the input, making the system unresponsive. A remote attacker could exploit this by providing a malicious XML file, potentially disrupting service availability.",
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        {
          "category": "vendor_fix",
          "date": "2026-07-29T21:38:00+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/",
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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"
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          "url": "https://access.redhat.com/errata/RHSA-2026:48238"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 2.2,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:python3-14-main@aarch64",
            "Red Hat Hardened Images:python3-14-main@noarch",
            "Red Hat Hardened Images:python3-14-main@src",
            "Red Hat Hardened Images:python3-14-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "python: Python: Performance degradation in XML processing due to quadratic time complexity"
    }
  ]
}

CVE-2026-6879 (GCVE-0-2026-6879)

Vulnerability from cvelistv5 – Published: 2026-07-28 13:46 – Updated: 2026-08-13 00:27

Title

Quadratic Behavior in xml.etree.ElementPath Index Predicates

Summary

`Element.findall()` and fully-consumed `Element.iterfind()` exhibit `O(n^2)` time complexity when using XPath index predicates (e.g. `[1]`, `[last()]`, `[last()-N]`) on XML documents with many same-tag siblings. `Element.find()` is only affected when the first match is near the end of the sibling list, such as with `[last()]` or `[last()-N]`; `.//item[1]` short-circuits after the first match.

Severity

2 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-28 14:49 UTC

CWE

CWE-407 - Inefficient Algorithmic Complexity

Assigner

PSF mitre root

References

10 references

URL	Tags
https://github.com/python/cpython/pull/152676	patch
https://github.com/python/cpython/issues/152674	issue-tracking
https://mail.python.org/archives/list/security-an…	vendor-advisory
https://github.com/python/cpython/commit/2ffab083…	patch
https://github.com/python/cpython/commit/02c08e6b…	patch
https://github.com/python/cpython/commit/390337b8…	patch
https://github.com/python/cpython/commit/cb409342…	patch
https://github.com/python/cpython/commit/96510a37…	patch
https://github.com/python/cpython/commit/037965c0…	patch
https://github.com/python/cpython/commit/0583f24a…	patch

Impacted products

1 product

Vendor	Product	Version
Python Software Foundation	CPython	Affected: 0 , < 3.10.21 (python) Affected: 3.11.0 , < 3.11.16 (python) Affected: 3.12.0 , < 3.12.14 (python) Affected: 3.13.0 , < 3.13.15 (python) Affected: 3.14.0 , < 3.14.7 (python) Affected: 3.15.0a1 , < 3.15.0rc1 (python)

Credits

dm (https://github.com/DarkaMaul) Petr Viktorin (https://github.com/encukou)

Show details on NVD website

JSON

To clipboard

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        {
          "lang": "en",
          "type": "coordinator",
          "value": "Petr Viktorin (https://github.com/encukou)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "type": "text/html",
              "value": "`Element.findall()` and fully-consumed `Element.iterfind()` exhibit `O(n^2)` time complexity when using XPath index predicates (e.g. `[1]`, `[last()]`, `[last()-N]`) on XML documents with many same-tag siblings. `Element.find()` is only affected when the first match is near the end\u0026nbsp; of the sibling list, such as with `[last()]` or `[last()-N]`;\u0026nbsp; `.//item[1]` short-circuits after the first match."
            }
          ],
          "value": "`Element.findall()` and fully-consumed `Element.iterfind()` exhibit `O(n^2)` time complexity when using XPath index predicates (e.g. `[1]`, `[last()]`, `[last()-N]`) on XML documents with many same-tag siblings. `Element.find()` is only affected when the first match is near the end\u00a0 of the sibling list, such as with `[last()]` or `[last()-N]`;\u00a0 `.//item[1]` short-circuits after the first match."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 2,
            "baseSeverity": "LOW",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "HIGH",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T00:27:08.214Z",
        "orgId": "28c92f92-d60d-412d-b760-e73465c3df22",
        "shortName": "PSF"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/pull/152676"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/python/cpython/issues/152674"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/7YMZ6DDZVR26TJJBVO3RDNBAVGHNYAKR/"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/2ffab083782968a4d732738f4f1dff6bbd69d2b0"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/02c08e6b747ac43d0d866a4ffa916bedf3423f81"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/390337b8ba1658833fdef379e1739c9f9533a8db"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/cb409342a19f25656f62e679f8bac265fe1442c3"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/96510a3758f4a075f43223afdee3b6ee1a7a7f02"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/037965c00a427cba5c05447efadc67c51a492e85"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/0583f24ae678993e3f7939f51ad5bcae5ad9dc70"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Quadratic Behavior in xml.etree.ElementPath Index Predicates",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
    "assignerShortName": "PSF",
    "cveId": "CVE-2026-6879",
    "datePublished": "2026-07-28T13:46:30.650Z",
    "dateReserved": "2026-04-22T18:26:56.743Z",
    "dateUpdated": "2026-08-13T00:27:08.214Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

RHSA-2026:48238

CVE-2026-6879 (GCVE-0-2026-6879)

Tags

Sightings

Nomenclature