7.1

CVE-2026-6861: gnu emacs Off-by-one Error

CVSS: 7.1v3.1HighAnalyzed
AliasesMGASA-2026-0213UBUNTU-CVE-2026-6861USN-8835-1
Published 22-04-2026Last modified 22-04-2026
Open JSON

Vulnerability summary

CVE-2026-6861 is a high (CVSS 7.1) Off-by-one Error vulnerability in gnu emacs. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 4% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (NVD)
EPSS score
0.15%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 22-04-2026
    PublishedVulnerability first disclosed.
  2. 22-04-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

+0.04 pp

From 0.11% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.15%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu4 products
  • emacs< 1:29.3+1-1ubuntu2+esm4 | All versions (No fix recorded) | < 1:30.2+1-2ubuntu1+esm1
  • emacs25All versions (No fix recorded)
  • xemacs21All versions (No fix recorded)
  • xemacs21-packagesAll versions (No fix recorded)
Debian1 product
  • emacsAll versions (No fix recorded) | < 1:30.1+1-6+deb13u1 | < 1:30.2+1-3
Gnu1 product
Mageia1 product
  • emacs< 29.4-1.4.mga9
Opensuse1 product
  • emacs&distro=openSUSE Tumbleweed< 30.2-8.1

5 vendors · 8 products

References

12 links
Show all 12 references