---
cve: "CVE-2026-42496"
severity: "CRITICAL"
cvss: 9.1
epss: "43%"
vendor: "BINGOS"
kev: false
exploited: false
published: "2026-05-26 02:16:40"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-16T12:46:13+02:00"
---

# CVE-2026-42496

> 9.1 CRITICAL · 🧪 PoC

## Beschreibung

Archive::Tar versions before 3.08 for Perl extract symlinks with attacker controlled targets outside the extraction directory.

_make_special_file() passes the tar header's linkname to symlink() without validating it against absolute paths or .. segments. The secure-extract mode check that guards regular file extraction does not cover the symlink target.

A subsequent open through the extracted name reads or writes the attacker chosen path.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 56670a5136ae16cacdca3ccd0735de044af01b48 (Commit)
- 17c873492a05eddc0de18c1485e0b2cccd5a9158 (Commit)

## Referenzen

- <https://github.com/jib/archive-tar-new/commit/17c873492a05eddc0de18c1485e0b2cccd5a9158.patch>
- <https://metacpan.org/release/BINGOS/Archive-Tar-3.08/changes>
- <https://www.cve.org/CVERecord?id=CVE-2026-42497>
- <https://access.redhat.com/errata/RHSA-2026:30851>
- <https://access.redhat.com/errata/RHSA-2026:30852>
- <https://access.redhat.com/errata/RHSA-2026:30856>
- <https://access.redhat.com/errata/RHSA-2026:30857>
- <https://access.redhat.com/security/cve/CVE-2026-42496>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2481314>
- <https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42496.json>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-42496) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_