5.5

CVE-2026-6843: gnu nano

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-6843DEBIAN-CVE-2026-6843
Published 22-04-2026Last modified 01-09-2026
Open JSON

Vulnerability summary

CVE-2026-6843 is a medium (CVSS 5.5) vulnerability in gnu nano. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 3.5% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
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

Advisory lineage

Upstream 0 · Downstream 4 · Related 3
MGASA-2026-0121OPENSUSE-SU-2026:10851-1OPENSUSE-SU-2026:21166-1USN-8386-1

Timeline

  1. 22-04-2026
    PublishedVulnerability first disclosed.
  2. 01-09-2026
    Last modifiedVulnerability information updated.

Description

A flaw was found in nano. A local user could exploit a format string vulnerability in the `statusline()` function. By creating a directory with a name containing `printf` specifiers, the application attempts to display this name, leading to a segmentation fault (SEGV). This results in a Denial of Service (DoS) for the `nano` application.

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

Redhat2 products
Debian1 product
  • nanoAll versions (No fix recorded) | < 8.4-1+deb13u1 | < 9.0-1
Gnu1 product
Ubuntu1 product
  • nano< 6.2-1ubuntu0.2 | < 7.2-2ubuntu0.2 | < 8.4-1ubuntu0.1 | < 8.7.1-1ubuntu0.1

4 vendors · 5 products

References

7 links