CVE-2026-33055: tar-rs is a tar archive reading/writing library for Rust

Q: How do I fix CVE-2026-33055?

tar-rs: upgrade to 0.4.45. Exact commands for each OS are on this page.

Q: Is CVE-2026-33055 being exploited?

CVE-2026-33055 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33055 affect?

CVE-2026-33055 affects tar-rs. Severity is high (CVSS 8.1). tar-rs is a tar archive reading/writing library for Rust. Versions 0.4.44 and below have conditional logic that skips the PAX size header in cases where the base header size is nonzero. As part of CVE-2025-62518, the astral-tokio-tar projec

Q: How urgent is CVE-2026-33055?

Priority 42/100. High severity; Public exploit reference

This month

HIGH 8.1UPGRADE

CVE-2026-33055 is a high-severity flaw (CVSS 8.1) affecting tar-rs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

tar-rs is a tar archive reading/writing library for Rust. Versions 0.4.44 and below have conditional logic that skips the PAX size header in cases where the base header size is nonzero. As part of CVE-2025-62518, the astral-tokio-tar project was changed to correctly honor PAX size headers in the case where it was different from the base header. This is almost the inverse of the astral-tokio-tar issue. Any discrepancy in how tar parsers honor file

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-843
Published	2026-03-20
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: alexcrichton

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-20 07:16 UTCPublished CVE record published
2026-06-17 10:36 UTCUpdated Record last modified

alexcrichton tar-rs UPGRADE

Affected: < 0.4.45

Fixed in: 0.4.45

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy tar-rs || rpm -q tar-rs || tar-rs --version

2. UPGRADE to 0.4.45 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tar-rs

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tar-rs

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Advisories and coverage

Official advisories

Rust Releases: Rust 1.94.1 2026-03-26

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33055?

tar-rs: upgrade to 0.4.45. Exact commands for each OS are on this page.

Is CVE-2026-33055 being exploited?

CVE-2026-33055 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33055 affect?

CVE-2026-33055 affects tar-rs. Severity is high (CVSS 8.1). tar-rs is a tar archive reading/writing library for Rust. Versions 0.4.44 and below have conditional logic that skips the PAX size header in cases where the base header size is nonzero. As part of CVE-2025-62518, the astral-tokio-tar projec

How urgent is CVE-2026-33055?

Priority 42/100. High severity; Public exploit reference

References

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