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TI-2025-10506 Aliases CVE-2025-11468GHSA-39h2-3mq3-959g

Folding email comments of unfoldable characters doesn't preserve parenthesis

Priority LOW 27CWE-93Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Passive
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Partial Red Hat: 1 fixed, 7 without a fix

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

Summary

When folding a long comment in an email header containing exclusively unfoldable characters, the parenthesis would not be preserved. This could be used for injecting headers into email messages where addresses are user-controlled and not sanitized.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00616 49th percentileScored 2026-11-07
Fix Partial CPython (Python Software Foundation): 3.10.20, 3.11.15, 3.12.13 +3Red Hat: 4 advisoriesRed Hat: 1 fixed, 7 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 3.10.20; 3.11.0 to before 3.11.15; 3.12.0 to before 3.12.13; 3.13.0 to before 3.13.12; 3.14.0 to before 3.14.3; 3.15.0a1 to before 3.15.0a63.10.20, 3.11.15, 3.12.13, 3.13.12, 3.14.3, 3.15.0a6Patch availableCNA
  • CPython VendorPython Software Foundation Affected before 3.10.20; 3.11.0 to before 3.11.15; 3.12.0 to before 3.12.13; 3.13.0 to before 3.13.12; 3.14.0 to before 3.14.3; 3.15.0a1 to before 3.15.0a6 Fixed in 3.10.20, 3.11.15, 3.12.13, 3.13.12, 3.14.3, 3.15.0a6 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*——python-pillow
  • cpe:2.3:a:python:python:*:*:*:*:*:*:*:* Versions — — ·python-pillow

Remediation

  • Fix · CNA CPython (Python Software Foundation) Fixed in 3.10.20, 3.11.15, 3.12.13, 3.13.12, 3.14.3, 3.15.0a6

Red Hat 4 advisories

  • RHSA-2026:8824 Released 2026-04-17 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images python3.12-3.12.13-3.hum1@aarch64, python3.12-3.12.13-3.hum1@src, python3.12-3.12.13-3.hum1@x86_64 +12
  • RHSA-2026:8822 Released 2026-04-17 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images python3.11-3.11.15-4.hum1@aarch64, python3.11-3.11.15-4.hum1@src, python3.11-3.11.15-4.hum1@x86_64 +12
  • RHSA-2026:7661 Released 2026-04-11 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images python-unversioned-command-3.14.4-1.hum1@noarch@public-hummingbird-aarch64-rpms, python-unversioned-command-3.14.4-1.hum1@noarch@public-hummingbird-x86_64-rpms, python3-3.14.4-1.hum1@aarch64 +28
Show 1 more Red Hat advisories
  • RHSA-2026:7443 Released 2026-04-10 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images python3.13-3.13.13-1.hum1@aarch64, python3.13-3.13.13-1.hum1@src, python3.13-3.13.13-1.hum1@x86_64 +16

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Python Software Foundation CPython 3.10.20, 3.11.15 and 4 more versions

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2025-13957 Header injection via newlines in data URL mediatypePriority LOW 28
    • TI-2026-00646 wsgiref.headers.Headers allows header newline injectionPriority LOW 27
    • TI-2026-00465 Header injection in http.cookies.MorselPriority LOW 27
    Show all 4 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
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)Affected—
Red Hat Hardened ImagesFixed RHSA-2026:7443, RHSA-2026:7661, RHSA-2026:8822, RHSA-2026:8824

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-11468
  2. 2026-10-03 Alias added: GHSA-39h2-3mq3-959g
  3. 2026-11-05 Affected versions changed · Red Hat
  4. 2026-11-06 Affected versions changed · Red Hat

References

Patch 7

Advisory 1

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