GHSA-CRQM-M339-7M2P pyzipper has an encryption bypass for small files encrypted using it

Impact A Python operator precedence bug in pyzipper/zipfileaes.py caused the AE-2 format to never be automatically selected during encryption, regardless of file size or compression type. As a result, all encrypted entries are written in AE-1 format unless AE-2 is explicitly forced by the caller...

PT-2026-41139

Name of the Vulnerable Software and Affected Versions pyzipper versions prior to 0.4.0 Description A Python operator precedence bug in pyzipper/zipfile aes.py prevents the AE-2 format from being automatically selected during encryption. Consequently, encrypted entries are written in AE-1 format...

zlib crc32_combine64 Heap Buffer Overflow DoS

The vulnerability of the crc32combine64 and crc32combinegen64 functions in the open-source data compression library zlib relates to the fact that the x2nmodp function may perform right shifts within a loop without a termination condition. Exploiting this vulnerability could allow an attacker to...

JLSEC-2026-480 zlib before 1.3.2 allows CPU consumption via `crc32_combine64` and `crc32_combine_gen64` because...

zlib before 1.3.2 allows CPU consumption via crc32combine64 and crc32combinegen64 because x2nmodp can do right shifts within a loop that has no termination condition...

Amazon Linux 2023 : nodejs22, nodejs22-devel, nodejs22-full-i18n (ALAS2023-2026-1616)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1616 advisory. A flaw was found in zlib. An attacker providing specially crafted input to the crc32combine64 or crc32combinegen64 functions could trigger an infinite loop within the x2nmodp function. This leads to...

Low: nodejs20

Issue Overview: A flaw was found in zlib. An attacker providing specially crafted input to the crc32combine64 or crc32combinegen64 functions could trigger an infinite loop within the x2nmodp function. This leads to excessive CPU consumption, which can result in a Denial of Service DoS for the...

Low: nodejs22

Issue Overview: A flaw was found in zlib. An attacker providing specially crafted input to the crc32combine64 or crc32combinegen64 functions could trigger an infinite loop within the x2nmodp function. This leads to excessive CPU consumption, which can result in a Denial of Service DoS for the...

Amazon Linux 2023 : nodejs20, nodejs20-devel, nodejs20-full-i18n (ALAS2023-2026-1608)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1608 advisory. A flaw was found in zlib. An attacker providing specially crafted input to the crc32combine64 or crc32combinegen64 functions could trigger an infinite loop within the x2nmodp function. This leads to...

SUSE-SU-2026:21013-1 Security update for zlib

This update for zlib fixes the following issues: - CVE-2026-27171: Fixed an infinite loop via the crc32combine64 and crc32combinegen64 functions due to missing checks for negative lengths. bsc1258392 - CVE-2023-45853: Fixed an integer overflow and resultant heap-based buffer overflow in...

MGASA-2026-0076 Updated zlib packages fix security vulnerability

zlib before 1.3.2 allows CPU consumption via crc32combine64 and crc32combinegen64 because x2nmodp can do right shifts within a loop that has no termination condition. CVE-2026-27171...

Updated zlib packages fix security vulnerability

zlib before 1.3.2 allows CPU consumption via crc32combine64 and crc32combinegen64 because x2nmodp can do right shifts within a loop that has no termination condition. CVE-2026-27171...

Advisory ROSA-SA-2026-3250

software: zlib 1.2.13 OS: ROSA-CHROME unaffected versions = zlib-1.2.13-2 affected versions zlib-1.2.13-2 CVE-ID: CVE-2026-27171 BDU-ID: None CVE-Crit: LOW CVE-DESC.: In zlib before 1.3.2, excessive CPU consumption DoS via crc32combine64 and crc32combinegen64 functions is possible: the x2nmodp...

OESA-2026-1583 zlib security update

Security Fixes: zlib before 1.3.2 allows CPU consumption via crc32combine64 and crc32combinegen64 because x2nmodp can do right shifts within a loop that has no termination condition.CVE-2026-27171...

OESA-2026-1585 zlib security update

Security Fixes: zlib before 1.3.2 allows CPU consumption via crc32combine64 and crc32combinegen64 because x2nmodp can do right shifts within a loop that has no termination condition.CVE-2026-27171...

OESA-2026-1586 zlib security update

Security Fixes: zlib before 1.3.2 allows CPU consumption via crc32combine64 and crc32combinegen64 because x2nmodp can do right shifts within a loop that has no termination condition.CVE-2026-27171...

SUSE-SU-2026:20659-1 Security update for zlib

This update for zlib fixes the following issues: - CVE-2026-27171: Fixed an infinite loop via the crc32combine64 and crc32combinegen64 functions due to missing checks for negative lengths. bsc1258392 - CVE-2023-45853: Fixed an integer overflow and resultant heap-based buffer overflow in...

SUSE-SU-2026:20709-1 Security update for zlib

This update for zlib fixes the following issues: - CVE-2026-27171: Fixed an infinite loop via the crc32combine64 and crc32combinegen64 functions due to missing checks for negative lengths. bsc1258392 - CVE-2023-45853: Fixed an integer overflow and resultant heap-based buffer overflow in...

SUSE SLED15: libminizip1 / libminizip1-32bit / libz1 / libz1-32bit / etc (SUSE-SU-2026:0783-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:0783-1 advisory. This update for zlib fixes the following issue: - CVE-2026-27171: Fixed infinite loop via the...

Security update for zlib

This update for zlib fixes the following issue: CVE-2026-27171: Fixed infinite loop via the crc32combine64 and crc32combinegen64 functions due to missing checks for negative lengths bsc1258392. Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST...

SUSE-SU-2026:0783-1 Security update for zlib

This update for zlib fixes the following issue: - CVE-2026-27171: Fixed infinite loop via the crc32combine64 and crc32combinegen64 functions due to missing checks for negative lengths bsc1258392...