What is GHSA-9c48-w39g-hm26?

GHSA-9c48-w39g-hm26 is a security advisory published by GitHub Security Advisories with Low severity. rsa crate has potential panic on a prime being equal to 1

Which CVE IDs does GHSA-9c48-w39g-hm26 cover?

GHSA-9c48-w39g-hm26 covers the following CVE IDs: CVE-2026-21895. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-9c48-w39g-hm26?

GHSA-9c48-w39g-hm26 affects 1 product, including: rust/rsa:\u003c= 0.9.9.

GHSA-9c48-w39g-hm26Low

rsa crate has potential panic on a prime being equal to 1

Vendor

GitHub Security Advisories

Published

January 6, 2026

Last Modified

January 8, 2026

🔗 CVE IDs covered (1)

CVE-2026-21895 →

📋 Description

When creating a RSA private key from its components, the construction panics, instead of returning an error, when one of the primes is 1.

Discovered by Christian Reitter from Radically Open Security during a security review for Proton AG.

🎯 Affected products1

rust/rsa:<= 0.9.9

🔗 References (4)

https://github.com/RustCrypto/RSA/security/advisories/GHSA-9c48-w39g-hm26
https://github.com/RustCrypto/RSA/commit/2926c91bef7cb14a7ccd42220a698cf4b1b692f7
https://nvd.nist.gov/vuln/detail/CVE-2026-21895
https://github.com/advisories/GHSA-9c48-w39g-hm26