CVE-2026-109380 modern-tar - Denial of Service

modern-tar 0.3.5 through 0.8.5 contains a denial of service caused by memory exhaustion via negative entry sizes from non-octal bytes in readOctal(), letting attackers exhaust process memory by supplying crafted archives, exploit requires crafted archive input.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.45% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
12 October 2026
Updated
15 October 2026
Weakness
CWE-1284

Vendor fix

Upgrade to the latest version beyond 0.8.5.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs