CVE-2026-109380: high-severity vulnerability in ayuhito modern-tar
modern-tar 0.3.5 through 0.8.5 Memory Exhaustion via Malformed Octal Size Field
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.4%
modern-tar 0.3.5 through 0.8.5 contains a memory exhaustion vulnerability that allows attackers to produce negative entry sizes via non-octal bytes parsed by readOctal(). Attackers can supply a crafted, optionally gzip-compressed, archive to unpackTar() that buffers chunks indefinitely, exhausting process memory and suppressing later entries.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
ayuhito · modern-tarReferences
https://github.com/ayuhito/modern-tarhttps://github.com/ayuhito/modern-tar/blob/v0.8.5/src/tar/encoding.tshttps://github.com/ayuhito/modern-tar/commit/181c8cb75351867535057817ada4802a90fe416ehttps://github.com/ayuhito/modern-tar/pull/195https://www.vulncheck.com/advisories/modern-tar-0.3.5-through-0.8.5-memory-exhaustion-via-malformed-octal-size-field