CVE-2026-66486

Improper Output Encoding in GNU cpio

Published: Aug 10, 2026Updated: Aug 28, 2026 Sources: CVE List NVDCWE-116

N/ACVSS

NVD MITRE

Description

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

No summary for this CVE yet.

Weaknesses

CWE-116

Affected Products

GNU

oss-project·USaka g. nu

cpio

OSS Libraries

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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References

https://cert.pl/en/posts/2026/08/CVE-2026-66484

cert.pl

https://git.savannah.gnu.org/cgit/cpio.git

git.savannah.gnu.org

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