CVE-2026-53600
Description
A flaw was found in async-tar, a library for reading and writing tar archives in Rust. The library incorrectly applies a buffered PAX size extension to an intermediary extension header instead of the intended next file entry. This allows an attacker to craft a malicious tar archive that manipulates the stream cursor, causing the parser to desynchronize. This desynchronization can lead to differential extraction or tar entry/content smuggling, where async-tar extracts different files or contents than a POSIX-compliant tar parser, potentially allowing an attacker to hide malicious payloads or alter expected file contents.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.3 | N/A | N/A |
| Attack Vector | Network | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | None | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | Low | N/A | N/A |
| Availability Impact | None | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
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