CVE-2026-108976 GNU Emacs - Command Injection

GNU Emacs before 31.2 and TRAMP through 2.8.2 contain a command injection caused by an incomplete list of disallowed inputs in tramp-user-regexp, letting attackers execute OS commands via crafted filenames, exploit requires crafted filename input.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.51% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Command Injection
Impact
Command Injection, Remote Code Execution
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
11 October 2026
Updated
15 October 2026
Weakness
CWE-184

Vendor fix

Update to GNU Emacs 31.2 or later and TRAMP 2.8.3 or later.

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

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