CVE-2025-62518
`tokio-tar` parses PAX extended headers incorrectly, allows file smuggling
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.
How to fix CVE-2025-62518
To remediate CVE-2025-62518, upgrade the affected package to a fixed version below.
- —upgrade to 0.5.6 or later
- —upgrade to 0.5.6 or later
- —no fix listed
- —no fix listed
- —no fix listed
- —upgrade to 0.9.5 or later
Is CVE-2025-62518 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- from 0, < 0.5.6
- >= 0.0.0-0, < 0.5.6
- from 0, <= 0.3.1
- >= 0.0.0-0
- from 0
- from 0, < 0.9.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N |