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Vulnerabilities

Vulnerability · CVE-2026-21895

The crate is an RSA implementation written in rust.

Published Jan 8, 2026 · catalog updated Jan 8, 2026 · RustCrypto RSA

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-21895. EPSS is 0.44%. Act only if a listed version of RustCrypto RSA is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low2.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.44%
Remediation
Version ranges on file
Affected products
vendor RustCrypto RSA < 0.9.10

The 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 . Version 0.9.10 fixes the issue.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor RustCrypto RSA < 0.9.10< 0.9.10

How to fix CVE-2026-21895

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-21895. EPSS is 0.44%. Act only if a listed version of RustCrypto RSA is installed.

Which versions are affected?

Compare what you have installed with RustCrypto RSA < 0.9.10 < 0.9.10. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.44%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 8, 2026 · EUVD

    Detected

    The 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 . Version 0.9.10 fixes the issue.

  2. Jan 8, 2026 · EUVD

    Updated

    The 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 . Version 0.9.10 fixes the issue.

Sources

  • CVE.orgVulnerability recordCVE-2026-21895

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-21895

    30-day exploitation probability 0.44%

    first.org
  • EUVDVulnerability recordEUVD-2026-1033

    The 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 . Version 0.9.10 fixes the issue.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 6, 2026
  • CVE.orgOct 31, 2026
  • EUVDOct 30, 2026