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In elisp-mode.el in GNU Emacs before 30.1, a user who chooses to invoke elisp-completion-at-point (for code completion) on untrusted Emacs Lisp source code can trigger unsafe Lisp macro expansion that allows attackers to execute arbitrary code. (This unsafe expansion also occurs if a user chooses to enable on-the-fly diagnosis that byte compiles untrusted Emacs Lisp source code.)

🗓️ 25 Mar 2025 07:00:00Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 2 Views

Unsafe Lisp macro expansion in elisp-mode allows arbitrary code execution from untrusted Emacs Lisp.

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19 Feb 2026 09:13Current
7.9High risk
Vulners AI Score7.9
CVSS 3.17.8 - 8.8
EPSS0.00053
SSVC
2