What is CVE-2026-6861?

CVE-2026-6861 is a medium-severity vulnerability in Gnu Emacs, classified under Off-by-one Error. CVSS score: 6.1/10. Published 2026-04-22.

How severe is CVE-2026-6861?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Vulnerability in Gnu Emacs

CVE-2026-6861

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 v…

EPSS: 0.000 (6.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H.

Affected products

Gnu Emacs
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Weakness classification (CWE)

CWE-193 — Off-by-one Error

References

secalert@redhat.com (x_refsource_REDHAT, Third Party Advisory, vdb-entry)
RHBZ#2459992 (x_refsource_REDHAT, issue-tracking, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2026-6861?: CVE-2026-6861 is a medium-severity vulnerability in Gnu Emacs, classified under Off-by-one Error. CVSS score: 6.1/10. Published 2026-04-22.
How severe is CVE-2026-6861?: Medium severity. CVSS v3 base score is 6.1 out of 10.