What is CVE-2026-33055?

CVE-2026-33055 is a high-severity vulnerability in Alexcrichton Tar-rs, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.1/10. Published 2026-03-20.

How severe is CVE-2026-33055?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Alexcrichton Tar-rs

CVE-2026-33055

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 proje…

EPSS: 0.004 (32.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

Affected products

Alexcrichton Tar-rs — versions < 0.4.45

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-33055?: CVE-2026-33055 is a high-severity vulnerability in Alexcrichton Tar-rs, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.1/10. Published 2026-03-20.
How severe is CVE-2026-33055?: High severity. CVSS v3 base score is 8.1 out of 10.