CVE-2026-66486mediumCWE-116

CVE-2026-66486: medium-severity vulnerability in GNU cpio

Improper Output Encoding in GNU cpio

Published

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 4.6epss 0.2%
GNU cpio is vulnerable to improper encoding or escaping of output in its archive member listing functionality. When listing archive members via cpio -it, member names are printed directly to output without quoting or escaping. An attacker can craft a cpio archive containing member names with embedded newline characters or ANSI escape sequences, causing forged listing entries or terminal control sequence injection when the listing is displayed. This issue has been fixed in commit 2ff9600c9ef32e88759843cdbde74c8db5ae9b30
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Affected products
GNU · cpio
Related CVEs — GNU cpio

In the same product, most dangerous first.

CVE-2026-66484MEDIUMPath Traversal in GNU cpioEPSS 0.2%CVE-2026-66485MEDIUMUncontrolled Memory Allocation in GNU cpioEPSS 0.2%