PatchTheCVECVE-2026-32884: Botan is a C++ cryptography library
CVE-2026-32884 is a medium-severity flaw (CVSS 5.9) affecting botan. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Botan is a C++ cryptography library. Prior to version 3.11.0, during processing of an X.509 certificate path using name constraints which restrict the set of allowable DNS names, if no subject alternative name is defined in the end-entity certificate Botan would check that the CN was allowed by the DNS name constraints, even though this check is technically not required by RFC 5280. However this check failed to account for the possibility of a mi
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.9 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 94%) |
| CISA exploited list | No |
| Weakness | CWE-295 |
| Published | 2026-03-30 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-32884?
botan: upgrade to 3.11.0. Exact commands for each OS are on this page.
Is CVE-2026-32884 being exploited?
CVE-2026-32884 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-32884 affect?
CVE-2026-32884 affects botan. Severity is medium (CVSS 5.9). Botan is a C++ cryptography library. Prior to version 3.11.0, during processing of an X.509 certificate path using name constraints which restrict the set of allowable DNS names, if no subject alternative name is defined in the end-entity c
How urgent is CVE-2026-32884?
Priority 27/100. Remotely exploitable, no login, no user action
Related CVEs
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- CVE-2026-32883 MEDIUM 5.9 UPGRADE Botan is a C++ cryptography library
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