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No exploitation reportedFix available

CVE-2026-32766

No exploitation reported by the sources we read.

  • Published2026-03-20
  • Fixed in0.6.0
  • WeaknessCWE-436

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-03-2000:16CVE publishedNVD

Versions per branch

NVD · OSV
Astral astral-tokio-tar
BranchAffectedFixed in
0.6< 0.6.00.6.0
0.x≥ 0.0.0-0, < 0.6.00.6.0

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • astral-sh tokio-tar
    Affected
    • = < 0.6.0no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-03-20

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • miseChainguardall versions · fixed in 2026.4.15-r0
  • pixiWolfiall versions · fixed in 0.69.0-r0
  • pixiChainguardall versions · fixed in 0.69.0-r0
  • py3.10-uv-buildMinimOSall versions · fixed in 0.10.12-r0and 12 other packages
  • python-uvSUSE:Linux Enterprise Server for SAP applications 16.0all versions · fixed in 0.7.18-160000.5.1
  • python-uvSUSE:Linux Enterprise Server 16.0all versions · fixed in 0.7.18-160000.5.1
  • rust-astral-tokio-tarUbuntu:26.10all versions · no fixed version listed
  • rust-astral-tokio-tarUbuntu:26.04:LTSall versions · no fixed version listed

7 more package ranges on OSV.dev

Full record on NVD

Fix

  1. Update Astral astral-tokio-tar to 0.6.0

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionnone2026-03-20
  • CNACVSS 4.01.7known since 2026-10-23
  • NVDCVSS 3.15.3read 2026-10-23
  • CNAweakness (CWE)CWE-436known since 2026-10-23
  • FIRST EPSSEPSS score0.3 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryMODERATE2026-03-17

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
2026-03-20
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-6gx3-4362-rf54

Frequently asked questions

What is CVE-2026-32766?

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.

Is CVE-2026-32766 actively exploited?

Active exploitation of CVE-2026-32766 has not been confirmed. Its EPSS score was 0.3% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-32766?

CVE-2026-32766 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

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