Skip to content
Fencer Vulns
medium 5.7

CVE-2026-1502 json

HTTP client proxy tunnel headers not validated for CR/LF

published 2026-04-10 6 mo ago modified 2026-10-26 13 d ago also BIT-libpython-2026-1502 , BIT-python-2026-1502 , BIT-python-min-2026-1502 , EUVD-2026-21519

cvss
5.7
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits
0
none known

Summary

CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.

Patch / fix

  • bitnami libpython 3.10.21, 3.11.16, 3.12.14, 3.13.14, 3.14.5
  • bitnami python 3.10.21, 3.11.16, 3.12.14, 3.13.14, 3.14.5
  • bitnami python-min 3.10.21, 3.11.16, 3.12.14, 3.13.14, 3.14.5
  • Python Software Foundation CPython 3.10.21, 3.11.16, 3.12.14, 3.13.14, 3.14.5rc1, 3.15.0b1
  • pypy3 Debian 14 7.3.22+dfsg-1
  • python3.11 Debian 12 3.11.2-6+deb12u9
  • python3.13 Debian 13 3.13.5-2+deb13u3
  • python3.14 Debian 14 3.14.5-1

debian advisories DEBIAN-CVE-2026-1502

  • python3.10 Ubuntu 22.04 LTS 3.10.12-1~22.04.16
  • python3.12 Ubuntu 24.04 LTS 3.12.3-1ubuntu0.15
  • python3.14 Ubuntu 26.04 LTS 3.14.4-1ubuntu0.1

ubuntu advisories UBUNTU-CVE-2026-1502

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

  • python3.14 RHEL 9 3.14.4-2.el9_8
  • python3.14-idle RHEL 9 3.14.4-2.el9_8
  • python3.14-libs RHEL 9 3.14.4-2.el9_8
  • python3.14-test RHEL 9 3.14.4-2.el9_8
  • python3.14-tkinter RHEL 9 3.14.4-2.el9_8
  • python3.14-freethreading RHEL 9 3.14.4-2.el9_8
  • python3.14-freethreading-idle RHEL 9 3.14.4-2.el9_8
  • python3.14-freethreading-libs RHEL 9 3.14.4-2.el9_8

red hat advisories RHSA-2026:19176RHSA-2026:19177RHSA-2026:19064RHSA-2026:19019RHSA-2026:10950RHSA-2026:10117

  • grafana Multi Linux Manager Tools SLE-15 12.4.10-150002.4.27.1
  • mgr-push Multi Linux Manager Tools SLE-15 5.2.5-150002.3.12.1
  • spacecmd Multi Linux Manager Tools SLE-15 5.2.10-150002.3.15.1
  • uyuni-tools Multi Linux Manager Tools SLE-Micro-5, Multi Linux Manager Tools SLE-15 5.2.17-150002.3.20.1
  • venv-salt-minion Multi Linux Manager Tools SLE-Micro-5, Multi Linux Manager Tools SLE-15 3006.0-150002.5.22.1
  • spacewalk-client-tools Multi Linux Manager Tools SLE-15 5.2.7-150002.3.12.1
  • golang-github-prometheus-prometheus Multi Linux Manager Tools SLE-15 3.13.2-150002.3.19.1
  • mgr-push Multi Linux Manager Tools SLE-12 5.2.5-120002.3.12.1

suse advisories SUSE-SU-2026:4585-1SUSE-SU-2026:4584-1SUSE-SU-2026:4583-1SUSE-SU-2026:4582-1SUSE-SU-2026:4581-1SUSE-SU-2026:4580-1

  • python3 openSUSE Leap 16.0 3.13.14-160000.1.1
  • python313 openSUSE Leap 16.0 3.13.14-160000.1.1
  • python313-core openSUSE Leap 16.0 3.13.14-160000.1.1
  • python313-nogil openSUSE Leap 16.0 3.13.14-160000.1.1
  • python313-documentation openSUSE Leap 16.0 3.13.14-160000.1.1
  • python313-nogil-nogil-core openSUSE Leap 16.0 3.13.14-160000.1.1
  • python314 openSUSE Tumbleweed 3.14.6-1.1
  • python312 openSUSE Tumbleweed 3.12.13-6.1

opensuse advisories openSUSE-SU-2026:21459-1openSUSE-SU-2026:11181-1openSUSE-SU-2026:11100-1openSUSE-SU-2026:11068-1openSUSE-SU-2026:10667-1openSUSE-SU-2026:10647-1

  • python3.14 AlmaLinux 10 3.14.4-2.el10_2
  • python3.14-idle AlmaLinux 10 3.14.4-2.el10_2
  • python3.14-libs AlmaLinux 10 3.14.4-2.el10_2
  • python3.14-test AlmaLinux 10 3.14.4-2.el10_2
  • python3.14-tkinter AlmaLinux 10 3.14.4-2.el10_2
  • python3.14-freethreading AlmaLinux 10 3.14.4-2.el10_2
  • python3.14-freethreading-idle AlmaLinux 10 3.14.4-2.el10_2
  • python3.14-freethreading-libs AlmaLinux 10 3.14.4-2.el10_2

almalinux advisories ALSA-2026:19019ALSA-2026:19064ALSA-2026:19176ALSA-2026:19177ALSA-2026:10950

  • python3.14 Rocky Linux 9 3.14.4-2.el9_8
  • python3.14 Rocky Linux 10 3.14.4-2.el10_2
  • python3.12 Rocky Linux 10 3.12.13-2.el10_2
  • python3.12 Rocky Linux 9 3.12.13-2.el9_8
  • python3.12 Rocky Linux 8 3.12.13-2.el8_10

rocky linux advisories RLSA-2026:19176RLSA-2026:19019RLSA-2026:19064RLSA-2026:19177RLSA-2026:10950

  • python3 Alpine 3.23, Alpine 3.22, Alpine 3.21 3.12.14-r0

alpine advisories ALPINE-CVE-2026-1502

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • python3 Azure Linux 3.0 3.12.9-11

azure linux advisories AZL-82899

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-2026-1502 updated cvss 4.5

python: Python: HTTP header injection via CR/LF in proxy tunnel headers

  • Red Hat Enterprise Linux 6 python, tkinter, python-libs, python-test, python-tools Red Hat Enterprise Linux 7 python, python3, tkinter, python-libs, python-test, python-tools, +4 more Red Hat Enterprise Linux 8 numpy, scipy, PyYAML, python3, mod_wsgi, python36, +83 more Red Hat Enterprise Linux 9 python3, python3.9, python3.11, python3-idle, python3-libs, python3-test, +6 more Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/bootc-rocm-rhel9, redhat-user-workloads/rhel-ai-tenant/rhelai-bootc-3-3/bootc-cuda-aws-3-3, redhat-user-workloads/rhel-ai-tenant/rhelai-bootc-3-3/bootc-cuda-gcp-3-3, redhat-user-workloads/rhel-ai-tenant/rhelai-bootc-3-3/bootc-cuda-azure-3-3, redhat-user-workloads/rhel-ai-tenant/rhelai-bootc-3-3/bootc-rocm-azure-3-3
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-dashboard-rhel9
    under investigation
  • Red Hat Enterprise Linux AppStream (v. 8) python3.12 3.12.13-2.el8_10, python3.12-libs 3.12.13-2.el8_10, python3.12-tkinter 3.12.13-2.el8_10, python3.12-rpm-macros 3.12.13-2.el8_10
    fixed: vendor fix RHSA-2026:10950
  • Red Hat Enterprise Linux AppStream (v. 9) python3.14 3.14.4-2.el9_8, python3.12 3.12.13-2.el9_8, python3.14-libs 3.14.4-2.el9_8, python3.12-libs 3.12.13-2.el9_8, python3.14-tkinter 3.14.4-2.el9_8, python3.12-tkinter 3.12.13-2.el9_8
    fixed: vendor fix RHSA-2026:19177
  • Red Hat Enterprise Linux AppStream (v. 10) python3.14 3.14.4-2.el10_2, python3.14-libs 3.14.4-2.el10_2, python3-tkinter 3.12.13-2.el10_2, python3.14-tkinter 3.14.4-2.el10_2, python-unversioned-command 3.12.13-2.el10_2 Red Hat Enterprise Linux BaseOS (v. 10) python3 3.12.13-2.el10_2, python3.12 3.12.13-2.el10_2, python3-libs 3.12.13-2.el10_2
    fixed: vendor fix RHSA-2026:19064
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) python3.14 3.14.4-2.el9_8, python3.12 3.12.13-2.el9_8, python3.14-idle 3.14.4-2.el9_8, python3.14-test 3.14.4-2.el9_8, python3.12-idle 3.12.13-2.el9_8, python3.12-test 3.12.13-2.el9_8, +7 more
    fixed: vendor fix RHSA-2026:19177
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) python3-idle 3.12.13-2.el10_2, python3-test 3.12.13-2.el10_2, python3.14-idle 3.14.4-2.el10_2, python3.14-test 3.14.4-2.el10_2, python3.14-freethreading 3.14.4-2.el10_2, python3.14-freethreading-idle 3.14.4-2.el10_2, +3 more
    fixed: vendor fix RHSA-2026:19064
  • Red Hat Enterprise Linux CRB (v. 8) python3.12 3.12.13-2.el8_10, python3.12-idle 3.12.13-2.el8_10, python3.12-test 3.12.13-2.el8_10, python3.12-tkinter 3.12.13-2.el8_10
    fixed: vendor fix RHSA-2026:10950
show 3 more
  • Red Hat Hardened Images python3 3.14.4-2.hum1, python3.14 3.14.4-2.hum1, python3.11 3.11.15-4.hum1, python3.12 3.12.13-3.hum1, python3-idle 3.14.4-2.hum1, python3-libs 3.14.4-2.hum1, +22 more
    fixed: vendor fix RHSA-2026:9228
  • Red Hat Update Infrastructure 5 rhui5/rhua-rhel9 1779798222, rhui5/rhua-tp-rhel9 1787241260, rhui5/installer-rhel9 1779798165, rhui5/installer-tp-rhel9 1787135742
    fixed: vendor fix RHSA-2026:21275
  • Red Hat Update Infrastructure 5 rhui5/cds-rhel9 1779798159, rhui5/cds-tp-rhel9 1787241206, rhui5/haproxy-rhel9 1779798164, rhui5/cds-kubernetes-tp-rhel9 1787241211
    not affected: vulnerable code not present

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
6 mo ago

Exploit prediction

0.53% chance of exploitation in the next 30 days, higher than 45% 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
<3.10.21
>=3.11.0, <3.11.16
>=3.12.0, <3.12.14
>=3.13.0, <3.13.14
>=3.14.0, <3.14.5
3.10.21
3.11.16
3.12.14
3.13.14
3.14.5
bitnami python
<3.10.21
>=3.11.0, <3.11.16
>=3.12.0, <3.12.14
>=3.13.0, <3.13.14
>=3.14.0, <3.14.5
3.10.21
3.11.16
3.12.14
3.13.14
3.14.5
bitnami python-min
<3.10.21
>=3.11.0, <3.11.16
>=3.12.0, <3.12.14
>=3.13.0, <3.13.14
>=3.14.0, <3.14.5
3.10.21
3.11.16
3.12.14
3.13.14
3.14.5

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.