High 8.1Published Oct 21, 2025

CVE-2025-62518astral-tokio-tar Vulnerable to PAX Header Desynchronization

Updated under an hour ago (Oct 27, 2026, 10:00 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for astral-sh tokio-tar

Exploited in the last 30 days

astral-tokio-tar is a tar archive reading/writing library for async Rust. Versions of astral-tokio-tar prior to 0.5.6 contain a boundary parsing vulnerability that allows attackers to smuggle additional archive entries by exploiting inconsistent PAX/ustar header handling. When processing archives with PAX-extended headers containing size overrides, the parser incorrectly advances stream position based on ustar header size (often zero) instead of the PAX-specified size, causing it to interpret file content as legitimate tar headers. This issue has been patched in version 0.5.6. There are no workarounds.

CVSS: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-843
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 22, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

astral-sh tokio-tar astral_sh:tokio_tar (from the name)	before 0.5.6	CNA record

References

References

https://github.com/astral-sh/tokio-tar/security/advisories/GHSA-j5gw-2vrg-8fgx	x-refsource-confirm
https://github.com/astral-sh/uv/security/advisories/GHSA-w476-p2h3-79g9	x-refsource-misc
https://github.com/astral-sh/tokio-tar/commit/22b3f884adb7a2adf1d3a8d03469533f5cbc8318	x-refsource-misc
https://edera.dev/stories/tarmageddon	x-refsource-misc
https://github.com/edera-dev/cve-tarmageddon	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.