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TI-2026-06328 Aliases CVE-2026-7210GHSA-wxv8-w48j-r2f4

The expat and elementtree parsers use insufficient entropy for XML hash-flooding protection

Priority LOW 29CWE-331Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Partial Red Hat: 1 fixed, 9 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

`xml.parsers.expat` and `xml.etree.ElementTree` use insufficient entropy for Expat hash-flooding protection, which allows a crafted XML document to trigger hash flooding.\r\n\r\nFully mitigating this vulnerability requires both updating libexpat to 2.8.0 or later and applying this patch.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00672 52nd percentileScored 2026-11-08
Fix Partial CPython (Python Software Foundation): 3.10.22, 3.11.16, 3.12.14 +3Red Hat: 5 advisoriesRed Hat: 1 fixed, 9 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Python Software FoundationCPythonbefore 3.10.22; 3.11.0 to before 3.11.16; 3.12.0 to before 3.12.14; 3.13.0 to before 3.13.14; 3.14.0 to before 3.14.6; 3.15.0a1 to before 3.15.0b23.10.22, 3.11.16, 3.12.14, 3.13.14, 3.14.6, 3.15.0b2Patch availableCNA
  • CPython VendorPython Software Foundation Affected before 3.10.22; 3.11.0 to before 3.11.16; 3.12.0 to before 3.12.14; 3.13.0 to before 3.13.14; 3.14.0 to before 3.14.6; 3.15.0a1 to before 3.15.0b2 Fixed in 3.10.22, 3.11.16, 3.12.14, 3.13.14, 3.14.6, 3.15.0b2 Patch available CNA

CPE configurations NVD · 10

CPEVersionsRoleVendor
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*before 3.13.14; 3.14.0 to before 3.14.6Vulnerablepython-pillow
cpe:2.3:a:python:python:3.15.0:alpha1:*:*:*:*:*:*3.15.0 alpha1Vulnerablepython-pillow
cpe:2.3:a:python:python:3.15.0:alpha2:*:*:*:*:*:*3.15.0 alpha2Vulnerablepython-pillow
cpe:2.3:a:python:python:3.15.0:alpha3:*:*:*:*:*:*3.15.0 alpha3Vulnerablepython-pillow
cpe:2.3:a:python:python:3.15.0:alpha4:*:*:*:*:*:*3.15.0 alpha4Vulnerablepython-pillow
cpe:2.3:a:python:python:3.15.0:alpha5:*:*:*:*:*:*3.15.0 alpha5Vulnerablepython-pillow
cpe:2.3:a:python:python:3.15.0:alpha6:*:*:*:*:*:*3.15.0 alpha6Vulnerablepython-pillow
cpe:2.3:a:python:python:3.15.0:alpha7:*:*:*:*:*:*3.15.0 alpha7Vulnerablepython-pillow
cpe:2.3:a:python:python:3.15.0:alpha8:*:*:*:*:*:*3.15.0 alpha8Vulnerablepython-pillow
cpe:2.3:a:python:python:3.15.0:beta1:*:*:*:*:*:*3.15.0 beta1Vulnerablepython-pillow
  • cpe:2.3:a:python:python:*:*:*:*:*:*:*:* Versions before 3.13.14; 3.14.0 to before 3.14.6 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.15.0:alpha1:*:*:*:*:*:* Versions 3.15.0 alpha1 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.15.0:alpha2:*:*:*:*:*:* Versions 3.15.0 alpha2 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.15.0:alpha3:*:*:*:*:*:* Versions 3.15.0 alpha3 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.15.0:alpha4:*:*:*:*:*:* Versions 3.15.0 alpha4 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.15.0:alpha5:*:*:*:*:*:* Versions 3.15.0 alpha5 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.15.0:alpha6:*:*:*:*:*:* Versions 3.15.0 alpha6 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.15.0:alpha7:*:*:*:*:*:* Versions 3.15.0 alpha7 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.15.0:alpha8:*:*:*:*:*:* Versions 3.15.0 alpha8 Vulnerable ·python-pillow
  • cpe:2.3:a:python:python:3.15.0:beta1:*:*:*:*:*:* Versions 3.15.0 beta1 Vulnerable ·python-pillow

Remediation

  • Fix · CNA CPython (Python Software Foundation) Fixed in 3.10.22, 3.11.16, 3.12.14, 3.13.14, 3.14.6, 3.15.0b2

Red Hat 5 advisories

  • RHSA-2026:69069 Released 2026-09-18 · Red Hat rating Moderate
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images python3.10-3.10.21-1.4.hum1@aarch64, python3.10-3.10.21-1.4.hum1@src, python3.10-3.10.21-1.4.hum1@x86_64 +12
  • RHSA-2026:68309 Released 2026-09-16 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images python3.13-3.13.15-1.3.hum1@aarch64, python3.13-3.13.15-1.3.hum1@src, python3.13-3.13.15-1.3.hum1@x86_64 +16
  • RHSA-2026:68154 Released 2026-09-16 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images python3.12-3.12.14-1.3.hum1@aarch64, python3.12-3.12.14-1.3.hum1@src, python3.12-3.12.14-1.3.hum1@x86_64 +12
Show 2 more Red Hat advisories
  • RHSA-2026:68135 Released 2026-09-16 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images python3.11-3.11.16-1.4.hum1@aarch64, python3.11-3.11.16-1.4.hum1@src, python3.11-3.11.16-1.4.hum1@x86_64 +12
  • RHSA-2026:67572 Released 2026-09-15 · Red Hat rating Important
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images python-unversioned-command-3.14.7-1.2.hum1@noarch@public-hummingbird-aarch64-rpms, python-unversioned-command-3.14.7-1.2.hum1@noarch@public-hummingbird-x86_64-rpms, python3-3.14.7-1.2.hum1@aarch64 +28

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Exploit IntelligenceAffectedNo fix yet: Fix deferred
Red Hat AI Inference ServerAffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 6AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet: Fix deferred
Red Hat Hardened ImagesFixed RHSA-2026:67572, RHSA-2026:68135, RHSA-2026:68154, RHSA-2026:68309, RHSA-2026:69069
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-7210
  2. 2026-10-03 Alias added: GHSA-wxv8-w48j-r2f4

References

Patch 8

Advisory 3

Other 1

  • TI-2024-07037 Quadratic complexity parsing cookies with backslashes CVSS 3.1HIGH 7.5
  • TI-2024-11791 Bypass extraction filter to modify file metadata outside extraction directory CVSS 3.1MEDIUM 5.3
  • TI-2024-00411 Quoted zip-bomb protection for zipfile CVSS 3.1MEDIUM 6.2
  • TI-2026-13296 `HTTPPasswordMgr` can send saved HTTPS credentials via HTTP because of incorrect scheme matching CVSS 4.0MEDIUM 6.0
  • TI-2024-06422 Email header injection due to unquoted newlines CVSS 3.1MEDIUM 5.5
  • TI-2026-04606 Possible to hijack modules in current working directory CVSS 4.0MEDIUM 5.6
See all 83 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences