CVE-2025-62518
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 3.1
- 8.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N - EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-25)
- CWE
- CWE-843
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-j5gw-2vrg-8fgx | crates.io | astral-tokio-tar | <0.5.6 | 0.5.6 |
| GHSA-j5gw-2vrg-8fgx | crates.io | tokio-tar | <=0.3.1 | no fix published |
| RUSTSEC-2025-0110 | crates.io | astral-tokio-tar | >=0.0.0-0 <0.5.6 | 0.5.6 |
| RUSTSEC-2025-0111 | crates.io | tokio-tar | >=0.0.0-0 | no fix published |
References
- https://edera.dev/stories/tarmageddon
- https://github.com/astral-sh/tokio-tar/commit/22b3f884adb7a2adf1d3a8d03469533f5cbc8318
- https://github.com/astral-sh/tokio-tar/security/advisories/GHSA-j5gw-2vrg-8fgx
- https://github.com/astral-sh/uv/security/advisories/GHSA-w476-p2h3-79g9
- https://github.com/edera-dev/cve-tarmageddon