CVE-2026-109380 — modern-tar 0.3.5 through 0.8.5 Memory Exhaustion via Malformed Octal Size Field
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(). Attack…
Published: 2026-10-12 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7