CVE-2025-62518

HIGH

Crates.io Astral-tokio-tar < 0.5.6 - Type Confusion

Title source: rule

Description

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.

Exploits (3)

nomisec WORKING POC 18 stars

by edera-dev · poc

https://github.com/edera-dev/cve-tarmageddon

View Code ZIP pw:eip

github WORKING POC 2 stars

by adminlove520 · pythonpoc

https://github.com/adminlove520/CVE-Poc_All_in_One/tree/main/2025/CVE-2025-62518

View Code ZIP pw:eip

nomisec WORKING POC

by AirineiAndrei · poc

https://github.com/AirineiAndrei/Tarmageddon-CVE-2025-62518-

View Code ZIP pw:eip

References (5)

[Various Sources] https://edera.dev/stories/tarmageddon

[Various Sources] https://github.com/edera-dev/cve-tarmageddon

[Patch] https://github.com/astral-sh/tokio-tar/commit/22b3f884adb7a2adf1d3a8d03469533f5cbc8318

[Vendor Advisory] https://github.com/astral-sh/tokio-tar/security/advisories/GHSA-j5gw-2vrg-8fgx

[Vendor Advisory] https://github.com/astral-sh/uv/security/advisories/GHSA-w476-p2h3-79g9

Scores

CVSS v3 8.1

EPSS 0.0002

EPSS Percentile 4.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Details

CWE

CWE-843

Status published

Products (3)

astral-sh/tokio-tar < 0.5.6

crates.io/astral-tokio-tar 0 - 0.5.6crates.io

crates.io/tokio-tar 0crates.io

Published Oct 21, 2025

Tracked Since Feb 18, 2026