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TI-2026-25255 Aliases CVE-2026-32766GHSA-6gx3-4362-rf54

astral-tokio-tar insufficiently validates PAX extensions during extraction

Priority LOW 9CWE-436Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Partial Red Hat: 4 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

astral-tokio-tar is a tar archive reading/writing library for async Rust. In versions 0.5.6 and earlier, malformed PAX extensions were silently skipped when parsing tar archives. This silent skipping (rather than rejection) of invalid PAX extensions could be used as a building block for a parser differential, for example by silently skipping a malformed GNU “long link” extension so that a subsequent parser would misinterpret the extension. In practice, exploiting this behavior in astral-tokio-tar requires a secondary misbehaving tar parser, i.e. one that insufficiently validates malformed PAX extensions and interprets them rather than skipping or erroring on them. This vulnerability is considered low-severity as it requires a separate vulnerability against any unrelated tar parser. This issue has been fixed in version 0.6.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00259 17th percentileScored 2026-11-07
Fix Partial tokio-tar (astral-sh): 0.6.0astral-tokio-tar (crates.io): 0.6.0Red Hat: 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
astral-shtokio-tarbefore 0.6.00.6.0Patch availableCNA
—astral-tokio-tar (crates.io)before 0.6.00.6.0Patch availableGHSA-6gx3-4362-rf54
  • tokio-tar Vendorastral-sh Affected before 0.6.0 Fixed in 0.6.0 Patch available CNA
  • astral-tokio-tar (crates.io) Vendor— Affected before 0.6.0 Fixed in 0.6.0 Patch available GHSA-6gx3-4362-rf54

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:astral:astral-tokio-tar:*:*:*:*:*:rust:*:*before 0.6.0VulnerableAstral
  • cpe:2.3:a:astral:astral-tokio-tar:*:*:*:*:*:rust:*:* Versions before 0.6.0 Vulnerable ·Astral

Remediation

  • Fix · CNA tokio-tar (astral-sh) Fixed in 0.6.0
  • Fix · GHSA-6gx3-4362-rf54 astral-tokio-tar (crates.io) Fixed in 0.6.0 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Confidential Compute AttestationAffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-32766
  2. 2026-10-03 Alias added: GHSA-6gx3-4362-rf54

References

Patch 1

Advisory 2

Other 2

  • TI-2025-38758 astral-tokio-tar Vulnerable to PAX Header Desynchronization CVSS 3.1HIGH 8.1
  • TI-2026-78723 Path traversal in Astral uv lets attackers delete arbitrary files CVSS 4.0HIGH 8.7
  • TI-2025-43946 Path traversal in Astral uv sdist extraction allows file writes CVSS 4.0HIGH 8.7
  • TI-2026-78722 Path traversal in uv lets malicious wheels write files CVSS 4.0HIGH 8.7
  • TI-2025-34180 uv is vulnerable to ZIP payload obfuscation through parsing differentials CVSS 4.0MEDIUM 6.8
  • TI-2026-66129 uv: Path traversal on Windows through wheel extraction CVSS 4.0MEDIUM 5.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences