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SUSE Python313 Important Security Updates Advisory 2026-2464-1

suse
Calendar Grey June 19, 2026
Dist Suse Esm H88
Critical update available for python313 on SUSE addressing multiple security issues. Immediate installation recommended.
An update that solves five vulnerabilities and has two security fixes can now be installed.

Summary

## This update for python313 fixes the following issues Security issues: * CVE-2026-1502: HTTP client proxy tunnel headers not validated for CR/LF (bsc#1261969). * CVE-2026-3446: Base64 decoding stops at first padded quad by default (bsc#1261970). * CVE-2026-4786: [oss-security][] CPython: Incomplete mitigation of , %action expansion for command injection to webbrowser.open() (bsc#1262319). * CVE-2026-6019: `BaseCookie.js_output()` does not neutralize characters in cookie values embedded in JS (bsc#1262654). * CVE-2026-6100: Arbitrary code execution or information disclosure via use- after-free in decompression modules (bsc#1262098). Non security issue: * Add missing BR `crypto-policies-scripts` (need for the fix of bsc#1211301). ## Patch Instructions:

Topics%20covered

Topics Covered

security advisory security issue SuSE arbitrary code execution important python313

References

* bsc#1211301

* bsc#1261969

* bsc#1261970

* bsc#1262098

* bsc#1262319

* bsc#1262654

* bsc#1263787

Cross-

* CVE-2026-1502

* CVE-2026-3446

* CVE-2026-4786

* CVE-2026-6019

* CVE-2026-6100

CVSS scores:

* CVE-2026-1502 ( SUSE ): 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

* CVE-2026-1502 ( SUSE ): 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

* CVE-2026-1502 ( NVD ): 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

* CVE-2026-3446 ( SUSE ): 6.0

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

* CVE-2026-3446 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2464-1
Release Date: 2026-06-19T09:44:33Z
Rating: important

Topics%20covered

Topics Covered

security advisory security issue SuSE arbitrary code execution important python313

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