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CVE-2026-21895

Good to know:

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Date: January 8, 2026

The "rsa" crate is an RSA implementation written in rust. Prior to version 0.9.10, when creating a RSA private key from its components, the construction panics instead of returning an error when one of the primes is "1". Version 0.9.10 fixes the issue.

Severity Score

Related Resources (5)

https://github.com/RustCrypto/RSA
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://www.mend.io/vulnerability-database/CVE-2026-21895

Severity Score

Weakness Type (CWE)

Improper Check or Handling of Exceptional Conditions

CWE-703

Top Fix

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Upgrade Version

Upgrade to version rsa - 0.9.10;https://github.com/RustCrypto/RSA.git - v0.9.10

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

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