CVE-2026-6861: Emacs: emacs: memory corruption vulnerability when processing svg css

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-22 · updated 2026-10-26
Weakness: CWE-193

Description

A flaw was found in GNU Emacs. This vulnerability, a memory corruption issue, occurs when Emacs processes specially crafted SVG (Scalable Vector Graphics) CSS (Cascading Style Sheets) data. A local user could exploit this by convincing a victim to open a malicious SVG file, which may lead to a denial of service (DoS) or potentially information disclosure.

Affected products

GNU Emacs: from 28.1 through 30.2

References

https://access.redhat.com/security/cve/CVE-2026-6861
https://bugzilla.redhat.com/show_bug.cgi?id=2459992

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