CVE-2026-41990
Libgcrypt Dilithium Signature Validation Buffer Overflow
Description
Libgcrypt before 1.12.2 mishandles Dilithium signing. Writes to a static array lack a bounds check but do not use attacker-controlled data.
INFO
Published Date :
April 23, 2026, 5:16 a.m.
Last Modified :
April 27, 2026, 6:33 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 8254265b-2729-46b6-b9e3-3dfca2d5bfca | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Libgcrypt to version 1.12.2 or later.
- Apply security patches for Libgcrypt.
- Review signing operations for static array vulnerabilities.
Public PoC/Exploit Available at Github
CVE-2026-41990 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-41990.
| URL | Resource |
|---|---|
| https://dev.gnupg.org/T8208 | Broken Link |
| https://lists.gnupg.org/pipermail/gnupg-announce/2026q2/000503.html | Mailing List Release Notes |
| https://www.openwall.com/lists/oss-security/2026/04/21/1 | Mailing List Release Notes |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-41990 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-41990
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Tracking Vulnerabilities That Appear to be Credited to the Anthropic Research Team
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-41990 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-41990 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 27, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:* versions from (including) 1.12.0 up to (excluding) 1.12.2 Added Reference Type MITRE: https://dev.gnupg.org/T8208 Types: Broken Link Added Reference Type MITRE: https://lists.gnupg.org/pipermail/gnupg-announce/2026q2/000503.html Types: Mailing List, Release Notes Added Reference Type MITRE: https://www.openwall.com/lists/oss-security/2026/04/21/1 Types: Mailing List, Release Notes -
New CVE Received by [email protected]
Apr. 23, 2026
Action Type Old Value New Value Added Description Libgcrypt before 1.12.2 mishandles Dilithium signing. Writes to a static array lack a bounds check but do not use attacker-controlled data. Added CVSS V3.1 AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L Added CWE CWE-787 Added Reference https://dev.gnupg.org/T8208 Added Reference https://lists.gnupg.org/pipermail/gnupg-announce/2026q2/000503.html Added Reference https://www.openwall.com/lists/oss-security/2026/04/21/1