CVE-2026-109380

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...

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. Attackers can supply a crafted, optionally gzip-compressed, archive to unpackTar that buffers chunks indefinitely, exhausting...

EUVD-2026-97878

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...

CVE-2026-109380

The modern-tar library (versions 0.3.5 through 0.8.5) is vulnerable to a memory exhaustion Denial of Service (DoS) condition. The root cause lies in the readOctal() function, which fails to properly validate non-octal bytes, allowing an attacker to produce negative entry sizes . By providing a sp...