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Fencer Vulns
medium 5.7

CVE-2025-11468 json

Folding email comments of unfoldable characters doesn't preserve parenthesis

published 2026-01-20 9 mo ago modified 2026-06-17 4 mo ago also BIT-libpython-2025-11468 , BIT-python-2025-11468 , BIT-python-min-2025-11468 , EUVD-2025-206306

cvss
5.7
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits
0
none known

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.

Patch / fix

  • bitnami libpython 3.10.20, 3.11.15, 3.12.13, 3.13.12, 3.14.3
  • bitnami python 3.10.20, 3.11.15, 3.12.13, 3.13.12, 3.14.3
  • bitnami python-min 3.10.20, 3.11.15, 3.12.13, 3.13.12, 3.14.3
  • Python Software Foundation CPython 3.10.20, 3.11.15, 3.12.13, 3.13.12, 3.14.3, 3.15.0a6
  • pypy3 Debian 14 7.3.21+dfsg-1
  • python3.11 Debian 12 3.11.2-6+deb12u7
  • python3.13 Debian 13 3.13.5-2+deb13u1
  • python3.14 Debian 14 3.14.3-1

debian advisories DEBIAN-CVE-2025-11468

  • python3.10 Ubuntu 22.04 LTS 3.10.12-1~22.04.14
  • python3.12 Ubuntu 24.04 LTS 3.12.3-1ubuntu0.11
  • python3.13 Ubuntu 25.10 3.13.7-1ubuntu0.3
  • python3.14 Ubuntu 25.10 3.14.0-1ubuntu0.2
  • python3.6 Ubuntu Pro 18.04 LTS 3.6.9-1~18.04ubuntu1.13+esm8
  • python3.7 Ubuntu Pro 18.04 LTS 3.7.5-2ubuntu1~18.04.2+esm9
  • python3.8 Ubuntu Pro 18.04 LTS 3.8.0-3ubuntu1~18.04.2+esm9
  • python3.8 Ubuntu Pro 20.04 LTS 3.8.10-0ubuntu1~20.04.18+esm5

ubuntu advisories UBUNTU-CVE-2025-11468

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • python3.11 hummingbird 1 3.11.15-4.hum1
  • python3.11-idle hummingbird 1 3.11.15-4.hum1
  • python3.11-libs hummingbird 1 3.11.15-4.hum1
  • python3.11-test hummingbird 1 3.11.15-4.hum1
  • python3.11-tkinter hummingbird 1 3.11.15-4.hum1
  • python3.12 hummingbird 1 3.12.13-3.hum1
  • python3.12-idle hummingbird 1 3.12.13-3.hum1
  • python3.12-libs hummingbird 1 3.12.13-3.hum1

red hat advisories RHSA-2026:8822RHSA-2026:8824RHSA-2026:7661RHSA-2026:7443

  • python311 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +6 more 3.11.15-150400.9.80.1
  • python311-core SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +6 more 3.11.15-150400.9.80.1
  • python311-documentation SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 3.11.15-150400.9.80.1
  • python311 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Python 3 15 SP7 +1 more 3.11.15-150600.3.53.1
  • python311-core SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Python 3 15 SP7 +2 more 3.11.15-150600.3.53.1
  • python311-documentation openSUSE Leap 15.6 3.11.15-150600.3.53.1
  • python311 Linux Micro 6.1 3.11.15-slfo.1.1_1.1
  • python311-core Linux Micro 6.1 3.11.15-slfo.1.1_1.1

suse advisories SUSE-SU-2026:1117-1SUSE-SU-2026:1349-1SUSE-SU-2026:20768-1SUSE-SU-2026:20796-1SUSE-SU-2026:20665-1SUSE-SU-2026:20710-1

  • python313 openSUSE Leap 16.0 3.13.12-160000.1.1
  • python313-core openSUSE Leap 16.0 3.13.12-160000.1.1
  • python313-nogil openSUSE Leap 16.0 3.13.12-160000.1.1
  • python313-documentation openSUSE Leap 16.0 3.13.12-160000.1.1
  • python313-nogil-nogil-core openSUSE Leap 16.0 3.13.12-160000.1.1
  • python311 openSUSE Tumbleweed 3.11.14-4.1
  • python312 openSUSE Tumbleweed 3.12.12-5.1
  • python313 openSUSE Tumbleweed 3.13.12-1.1

opensuse advisories openSUSE-SU-2026:20254-1openSUSE-SU-2026:10221-1openSUSE-SU-2026:10222-1openSUSE-SU-2026:10223-1openSUSE-SU-2026:10200-1openSUSE-SU-2026:10126-1

  • python3 Azure Linux 3.0 3.12.9-8

azure linux advisories AZL-75035

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-11468 updated cvss 4.5

cpython: Missing character filtering in Python

  • Red Hat Enterprise Linux 6 python, tkinter, python-libs, python-test, python-tools Red Hat Enterprise Linux 7 python, firefox, python3, tkinter, python-libs, python-test, +5 more Red Hat Enterprise Linux 8 numpy, scipy, PyYAML, firefox, python3, mod_wsgi, +90 more Red Hat Enterprise Linux 9 firefox, python3, python3.9, python3.11, python3.12, python3.14, +23 more Red Hat Enterprise Linux 10 firefox, python3.12, python3.14 Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/bootc-aws-cuda-rhel9, rhelai3/bootc-gcp-cuda-rhel9, rhelai3/bootc-azure-cuda-rhel9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-dashboard-rhel9
    under investigation
  • Red Hat Hardened Images python3 3.14.4-1.hum1, python3.14 3.14.4-1.hum1, python3.11 3.11.15-4.hum1, python3.12 3.12.13-3.hum1, python3.13 3.13.13-1.hum1, python3-idle 3.14.4-1.hum1, +22 more
    fixed: vendor fix RHSA-2026:7661

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
9 mo ago

Exploit prediction

0.62% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 5.7 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
CNA 4.0 5.7 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
bitnami libpython
<3.10.20
>=3.11.0, <3.11.15
>=3.12.0, <3.12.13
>=3.13.0, <3.13.12
>=3.14.0, <3.14.3
3.10.20
3.11.15
3.12.13
3.13.12
3.14.3
bitnami python
<3.10.20
>=3.11.0, <3.11.15
>=3.12.0, <3.12.13
>=3.13.0, <3.13.12
>=3.14.0, <3.14.3
3.10.20
3.11.15
3.12.13
3.13.12
3.14.3
bitnami python-min
<3.10.20
>=3.11.0, <3.11.15
>=3.12.0, <3.12.13
>=3.13.0, <3.13.12
>=3.14.0, <3.14.3
3.10.20
3.11.15
3.12.13
3.13.12
3.14.3

Affected products

  • Python Software Foundation CPython

Classification

Weakness
  • CWE-93 Improper Neutralization of CRLF Sequences

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.