MEDIUM
CVE-2026-41990
CWE-787Published: April 23, 2026· Updated: Apr 27, 2026
4.0
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:1.7th
Official 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.
Technical Analysis
CVE-2026-41990 requires local access, meaning attackers must already have a foothold on the target system.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityLow
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
Affected Vendors & Products
gnupg1 product
libgcrypt
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
All References (3)
→
https://dev.gnupg.org/T8208Broken Link
→
https://lists.gnupg.org/pipermail/gnupg-announce/2026q2/000503.htmlMailing List · Release Notes
→
https://www.openwall.com/lists/oss-security/2026/04/21/1Mailing List · Release Notes
Quick Facts
CVE IDCVE-2026-41990
CVSS Score4.0 / 10
SeverityMEDIUM
WeaknessCWE-787
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedApr 23, 2026
Related CVEs (CWE-787)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-41990 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.