CVE-2024-39331

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-06-23 · updated 2026-06-17
Weakness: CWE-94

Description

In Emacs before 29.4, org-link-expand-abbrev in lisp/ol.el expands a %(...) link abbrev even when it specifies an unsafe function, such as shell-command-to-string. This affects Org Mode before 9.7.5.

Affected products

GNU Emacs: before 29.4 — fixed in 29.4

How to fix

Upgrade to a fixed version: GNU Emacs 29.4. Check the vendor advisory for mitigations.

References

https://git.savannah.gnu.org/cgit/emacs.git/tree/etc/NEWS?h=emacs-29
https://git.savannah.gnu.org/cgit/emacs/org-mode.git/commit/?id=f4cc61636947b5c2f0afc67174dd369fe3277aa8
https://list.orgmode.org/87sex5gdqc.fsf%40localhost/
https://lists.debian.org/debian-lts-announce/2024/06/msg00023.html
https://lists.debian.org/debian-lts-announce/2024/06/msg00024.html
https://lists.gnu.org/archive/html/info-gnu-emacs/2024-06/msg00000.html
https://news.ycombinator.com/item?id=40768225
https://www.openwall.com/lists/oss-security/2024/06/23/1
https://www.openwall.com/lists/oss-security/2024/06/23/2
https://git.savannah.gnu.org/cgit/emacs.git/tree/etc/NEWS?h=emacs-29
https://git.savannah.gnu.org/cgit/emacs/org-mode.git/commit/?id=f4cc61636947b5c2f0afc67174dd369fe3277aa8
https://list.orgmode.org/87sex5gdqc.fsf%40localhost/

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