What’s Vulnerable › Vulnerabilities

CVE-2021-24115

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-22 · updated 2026-06-17

Description

In Botan before 2.17.3, constant-time computations are not used for certain decoding and encoding operations (base32, base58, base64, and hex).

Affected products

• randombit botan: before 2.17.3 — fixed in 2.17.3

How to fix

Upgrade to a fixed version: randombit botan 2.17.3. Check the vendor advisory for mitigations.

References

• https://botan.randombit.net/news.html
• https://github.com/randombit/botan/compare/2.17.2...2.17.3
• https://github.com/randombit/botan/pull/2549
• https://botan.randombit.net/news.html
• https://github.com/randombit/botan/compare/2.17.2...2.17.3
• https://github.com/randombit/botan/pull/2549

Get alerted when CVE-2021-24115 or the next vulnerability affects your stack