CVE-2026-43864

Name: CVE-2026-43864
Creator: NVD / NIST
Published: 2026-05-04T07:16:01.19+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.5/10EPSS 0.10%

Last modified Jun 17, 2026

CVE-2026-43864 is a low-severity vulnerability rated 2.5/10 on the CVSS scale. mutt before 2.3.2 has a show_sig_summary NULL pointer dereference.. EPSS estimates a 0.10% chance of exploitation in the next 30 days.

Description

mutt before 2.3.2 has a show_sig_summary NULL pointer dereference.

Metrics

CVSS 3.1

2.5/10

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

EPSS Probability

0.10%

0.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

References

https://github.com/muttmua/mutt/commit/ebfa2969042d89303d15334193fcc32866c8a8df

Timeline

Published: May 4, 2026
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2026-43864?

mutt before 2.3.2 has a show_sig_summary NULL pointer dereference.

How severe is CVE-2026-43864?

CVE-2026-43864 has a CVSS score of 2.5/10 (LOW severity). The EPSS model estimates a 0.10% probability of exploitation in the next 30 days.

How do I fix CVE-2026-43864?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-43864?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST