What’s Vulnerable › Vulnerabilities

CVE-2023-27986

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-03-09 · updated 2026-06-17
• Weakness: CWE-94

Description

emacsclient-mail.desktop in Emacs 28.1 through 28.2 is vulnerable to Emacs Lisp code injections through a crafted mailto: URI with unescaped double-quote characters. It is fixed in 29.0.90.

Affected products

• GNU Emacs: from 28.1 through 28.2

References

• http://git.savannah.gnu.org/cgit/emacs.git/commit/?h=emacs-29&id=3c1693d08b0a71d40a77e7b40c0ebc42dca2d2cc
• http://www.openwall.com/lists/oss-security/2023/03/09/1
• https://www.gabriel.urdhr.fr/2023/06/08/emacsclient-mail-shell-elisp-injections/
• https://www.openwall.com/lists/oss-security/2023/03/08/2
• http://git.savannah.gnu.org/cgit/emacs.git/commit/?h=emacs-29&id=3c1693d08b0a71d40a77e7b40c0ebc42dca2d2cc
• http://www.openwall.com/lists/oss-security/2023/03/09/1
• https://www.gabriel.urdhr.fr/2023/06/08/emacsclient-mail-shell-elisp-injections/
• https://www.openwall.com/lists/oss-security/2023/03/08/2

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