Bug 2513651 (CVE-2026-73030)

Summary: CVE-2026-73030 unearth: unearth: Arbitrary file write via unnormalized paths
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in unearth. This path traversal vulnerability exists in the is_within_directory function, which fails to normalize paths before validation. This allows `../` sequences to bypass directory containment checks. An attacker can exploit this by supplying malicious tar archives with symlink members or traversal sequences, leading to the ability to write files to arbitrary filesystem locations accessible to the process.
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Description OSIDB Bzimport 2026-08-10 20:21:24 UTC 
unearth through 0.18.2, fixed in commit 6c78164, contains a path traversal vulnerability in the is_within_directory function that fails to normalize paths before validation, allowing ../ sequences to bypass directory containment checks. Attackers can supply malicious tar archives with symlink members or traversal sequences to write files to arbitrary filesystem locations accessible to the process.