CVE-2026-2681
Medium · 5.3CVSS
5.3
EPSS
0.6%
Published
Feb 19, 2026
CISA due date
—
The record
A flaw was found in the blst cryptographic library. This out-of-bounds stack write vulnerability, specifically in the blst_sha256_bcopy assembly routine, occurs due to a missing zero-length guard. A remote attacker can exploit this by providing a zero-length salt parameter to key generation functions, such as blst_keygen_v5(), if the application exposes this functionality. Successful exploitation leads to memory corruption and immediate process termination, resulting in a denial-of-service (DoS) condition.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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