What is CVE-2026-41678?

CVE-2026-41678 is a critical-severity vulnerability in Rust-openssl, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2026-04-24.

How severe is CVE-2026-41678?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Rust-openssl

CVE-2026-41678

rust-openssl provides OpenSSL bindings for the Rust programming language. From to before 0.10.78, aes::unwrap_key() contains an incorrect assertion: it checks that out.len() + 8 <= in_.len(), but this condition is reversed. The intended…

Vulnerability class: Buffer Overflow

EPSS: 0.001 (20.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Rust-openssl — versions >= 0.10.24, < 0.10.78
Rust-openssl_project Rust-openssl

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-8c75-8mhr-p7r9 (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-41678?: CVE-2026-41678 is a critical-severity vulnerability in Rust-openssl, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2026-04-24.
How severe is CVE-2026-41678?: Critical severity. CVSS v3 base score is 9.8 out of 10.