---
cve: "CVE-2025-62518"
severity: "HIGH"
cvss: 8.1
epss: "0.7%"
vendor: "astral-sh"
kev: false
exploited: false
published: "2025-10-21 17:15:40"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-23T01:03:02+02:00"
---

# CVE-2025-62518

> 8.1 HIGH · 🧪 PoC

## Beschreibung

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.

## CNA-Record (Kanon, cvelistV5)

- CNA: **GitHub_M**
- State: PUBLISHED
- Stand: 2025-10-22 13:23:33
- CNA-CVSS: **8.1** (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Schwachstellen-Klasse

- **CWE-843** — Access of Resource Using Incompatible Type ('Type Confusion')
  The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

## Patch verfügbar (OSV)

- ae1fc1d484f5dd8aecdca7ec7643b43b86faddf1 (Commit)
- 22b3f884adb7a2adf1d3a8d03469533f5cbc8318 (Commit)

## Referenzen

- <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/astral-sh/tokio-tar/commit/22b3f884adb7a2adf1d3a8d03469533f5cbc8318>
- <https://edera.dev/stories/tarmageddon>
- <https://github.com/edera-dev/cve-tarmageddon>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2025-62518/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_