CLSA-2026-1791897945 python3: Fix of 4 CVEs

CVE-2026-11940: pass filterfunction through TarFile.extract so the hardlink-extraction fallback is filtered prerequisite - CVE-2026-11940: filter the symlink at the hardlink's own path so a hardlink to a deeper symlink cannot recreate it at a shallower path and escape the destination directory -...

CLSA-2026-1788769322 python3.9: Fix of CVE-2026-11940

CVE-2026-11940: validate the hardlink-extraction fallback target against the name the link is recreated at in tarfile's makelinkwithfilter, so a crafted archive can no longer smuggle a symlink stored at a deeper name out of the destination directory, and route the extraction filter through...

CLSA-2026-1787647735 python3: Fix of 2 CVEs

CVE-2026-0864: normalize CR and CRLF line endings when writing multi-line configparser values, preventing config-file injection - CVE-2026-11940: re-filter the hardlink-extraction fallback at the link member's own path so a crafted archive cannot create a symlink outside the destination directory...

PT-2026-56968

Name of the Vulnerable Software and Affected Versions decompress versions prior to 4.2.2 Description An issue exists during archive extraction where arbitrary hardlink creation is possible. When processing hardlink entries type === 'link', the x.linkname field from the archive is passed directly ...

USN-8467-2: Perl vulnerabilities

USN-8467-1 fixed vulnerabilities in Perl. This update provides the corresponding fix for Perl on Ubuntu 25.10. Original advisory details: It was discovered that Perl's Archive::Tar module incorrectly handled symlink and hardlink targets during extraction. An attacker could use this issue to read ...

USN-8467-2 perl vulnerabilities

USN-8467-1 fixed vulnerabilities in Perl. This update provides the corresponding fix for Perl on Ubuntu 25.10. Original advisory details: It was discovered that Perl's Archive::Tar module incorrectly handled symlink and hardlink targets during extraction. An attacker could use this issue to read ...

ALPINE-CVE-2026-4360

In the Tarfile.extract function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract function...

MGASA-2026-0230 Updated perl-Archive-Tar package fixes security vulnerabilities

The updated package fixes security vulnerabilities: Archive::Tar versions before 3.08 for Perl extract symlinks with attacker controlled targets outside the extraction directory. CVE-2026-42496 Archive::Tar versions before 3.08 for Perl extract hardlinks to attacker controlled paths outside the...

AZL-89136 CVE-2026-42497 affecting package perl for versions less than 5.38.2-510

Archive::Tar versions before 3.08 for Perl extract hardlinks to attacker controlled paths outside the extraction directory. makespecialfile passes the tar header's linkname to link without validating it against absolute paths or .. segments, creating a hardlink that shares the victim file's inode...

Arbitrary File Overwrite

fstream is vulnerable to arbitrary file overwrite. The vulnerability exists as fstream allows overwriting an existing file on the system through extracting a hardlink...