VulnerabilityAwaiting Analysis

CVE-2026-57062

CMS (Cryptographic Message Syntax) parsing in gpgsm in GnuPG through 2.5.20 mishandles the CMS format for AES-GCM because aes-ICVlen is supposed to be 12 bytes but 4 bytes is accepted.

LOW 2.9EPSS 0.14%

Does this matter?

Lower severity and a low EPSS score (0.14%). Track it; it rarely justifies an emergency change on its own.

Description

CMS (Cryptographic Message Syntax) parsing in gpgsm in GnuPG through 2.5.20 mishandles the CMS format for AES-GCM because aes-ICVlen is supposed to be 12 bytes but 4 bytes is accepted. NOTE: this is related to CVE-2026-34182.

CVSS 3.1: 2.9 LOWCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS: 0.14% probability · 4th percentile
CISA KEV: Not listed
Weakness: CWE-1284
Source: cve@mitre.org

References

https://blog.calif.io/p/how-to-format-a-ciphertext
https://www.gnupg.org/download/

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.