CVE-2026-43860

LOW

Published May 4, 2026 Modified May 5, 2026 CWE-193

Description

mutt before 2.3.2 sometimes truncates the hash_passwd by one byte for IMAP auth_cram MD5 digest.

CVSS v3.1 Score

3.7

LOW

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

EPSS — Exploit Prediction

0.0004

Probability of exploitation

0.12%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-193 CWE-193

References

Other References

https://github.com/muttmua/mutt/commit/834c5a2ed0479e51e8662a31caed129f136f4805

Frequently Asked Questions

What is CVE-2026-43860? +

mutt before 2.3.2 sometimes truncates the hash_passwd by one byte for IMAP auth_cram MD5 digest. It has a CVSS v3.1 base score of 3.7 (LOW).

How severe is CVE-2026-43860? +

CVE-2026-43860 has a CVSS v3.1 score of 3.7 out of 10, rated LOW. This is a low-severity vulnerability with limited impact. The EPSS score is 0.0004, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-43860? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2024-10442 10.0

Off-by-one error vulnerability in the transmission component in Synology Replication Service before 1.0.12-0066, 1.2.2-0353 and 1.3.0-0423 and Synology Unified Controller …

CVE-2024-38441 9.8

Netatalk before 3.2.1 has an off-by-one error and resultant heap-based buffer overflow because of setting ibuf[len] to '\0' in FPMapName …

CVE-2026-48689 9.8

FastNetMon Community Edition through 1.2.9 contains an off-by-one heap-based buffer overflow in the dynamic_binary_buffer_t class (src/dynamic_binary_buffer.hpp). Five methods (append_dynamic_buffer, append_data_as_pointer, …

CVE-2024-51554 9.1

Default Credentail vulnerabilities in ASPECT on Linux allows access to the product using publicly available default credentials. Affected products: ABB …

CVE-2025-43971 8.6

An issue was discovered in GoBGP before 3.35.0. pkg/packet/bgp/bgp.go allows attackers to cause a panic via a zero value for …

CVE-2024-32668 8.2

An insufficient boundary validation in the USB code could lead to an out-of-bounds write on the heap, with data controlled …