CVE-2026-96442

HIGH 7.8

Emacs: emacs: arbitrary code execution in flymake mode

CVSS Score

7.8

EPSS Score

0.2%

EPSS Percentile

10th

A code execution flaw was found in Emacs, affecting versions prior to 31.2. The Flymake mode using language backends other than Lisp would execute arbitrary code from the edited file while performing syntax checking. Viewing or editing untrusted files using Emacs could lead to arbitrary code execution with the privileges of the user running Emacs.

CWE	CWE-94
Vendor	gnu emacs
Product	gnu emacs
Published	Sep 23, 2026
Last Updated	Nov 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

GNU Emacs / GNU Emacs

0 < 31.2

Red Hat / Red Hat Enterprise Linux 10

All versions affected

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 9

All versions affected

Red Hat / Red Hat Enterprise Linux 6

All versions affected

Red Hat / Red Hat Enterprise Linux 7

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

access.redhat.com: https://access.redhat.com/errata/RHSA-2026:84591 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:85245 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:90800 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-96442 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2537347 github.com: https://github.com/emacs-mirror/emacs/commit/135e6f63f08fee3d374fa1a5187bce941a2d3e3c github.com: https://github.com/emacs-mirror/emacs/commit/abc802ee2eb0b1663349ddf22a461f8e54a383fb openwall.com: https://www.openwall.com/lists/oss-security/2026/09/14/1