How severe is CVE-2026-32883?

CVE-2026-32883 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-32883 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-32883?

CVE-2026-32883 affects Botan Project Botan. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-32883?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-32883 have an EU (EUVD) identifier?

Yes. CVE-2026-32883 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17211.

When was CVE-2026-32883 published?

CVE-2026-32883 was published on 2026-03-30 and last updated on 2026-06-17.

CVE-2026-32883

CVE-2026-32883 is a medium-severity vulnerability in Botan Project Botan with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-347.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17211
Weakness: CWE-347
Affected product: Botan Project Botan
Published: 2026-03-30
Last modified: 2026-06-17

Description

Botan is a C++ cryptography library. From version 3.0.0 to before version 3.11.0, during X509 path validation, OCSP responses were checked for an appropriate status code, but critically omitted verifying the signature of the OCSP response itself. This issue has been patched in version 3.11.0.

Frequently asked questions

What is CVE-2026-32883?: Botan is a C++ cryptography library. From version 3.0.0 to before version 3.11.0, during X509 path validation, OCSP responses were checked for an appropriate status code, but critically omitted verifying the signature of the OCSP response itself. This issue has been patched in version 3.11.0.
How severe is CVE-2026-32883?: CVE-2026-32883 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-32883 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-32883?: CVE-2026-32883 affects Botan Project Botan. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-32883?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-32883 have an EU (EUVD) identifier?: Yes. CVE-2026-32883 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17211.
When was CVE-2026-32883 published?: CVE-2026-32883 was published on 2026-03-30 and last updated on 2026-06-17.

References

https://github.com/randombit/botan/security/advisories/GHSA-9j2j-hqmc-hf5x

Affected products (1)

cpe:2.3:a:botan_project:botan:*:*:*:*:*:*:*:*

More vulnerabilities in Botan Project Botan

CVE-2021-24115 — Critical (CVSS 9.8): In Botan before 2.17.3, constant-time computations are not used for certain decoding and encoding operations (base32,…
CVE-2018-9127 — Critical (CVSS 9.8): Botan 2.2.0 - 2.4.0 (fixed in 2.5.0) improperly handled wildcard certificates and could accept certain certificates as…
CVE-2016-6878 — Critical (CVSS 9.8): The Curve25519 code in botan before 1.11.31, on systems without a native 128-bit integer type, might allow attackers to…
CVE-2015-7826 — Critical (CVSS 9.8): botan 1.11.x before 1.11.22 improperly handles wildcard matching against hostnames, which might allow remote attackers…
CVE-2016-9132 — Critical (CVSS 9.8): In Botan 1.8.0 through 1.11.33, when decoding BER data an integer overflow could occur, which would cause an incorrect…
CVE-2016-2196 — Critical (CVSS 9.8): Heap-based buffer overflow in the P-521 reduction function in Botan 1.11.x before 1.11.27 allows remote attackers to…

All CVEs affecting Botan Project Botan →

Other CWE-347 (Improper Verification of Cryptographic Signature) vulnerabilities

CVE-2026-48558 — Critical (CVSS 10.0): SimpleHelp versions 5.5.15 and prior and 6.0 pre-release versions contain an authentication bypass vulnerability in the…
CVE-2023-25574 — Critical (CVSS 10.0): `jupyterhub-ltiauthenticator` is a JupyterHub authenticator for learning tools interoperability (LTI).…
CVE-2024-45409 — Critical (CVSS 10.0): The Ruby SAML library is for implementing the client side of a SAML authorization. Ruby-SAML in <= 12.2 and 1.13.0 <=…
CVE-2024-32962 — Critical (CVSS 10.0): xml-crypto is an xml digital signature and encryption library for Node.js. In affected versions the default…
CVE-2022-24884 — Critical (CVSS 10.0): ecdsautils is a tiny collection of programs used for ECDSA (keygen, sign, verify). `ecdsa_verify_[prepare_]legacy()`…
CVE-2021-33885 — Critical (CVSS 10.0): An Insufficient Verification of Data Authenticity vulnerability in B. Braun SpaceCom2 prior to 012U000062 allows a…

Browse all CWE-347 (Improper Verification of Cryptographic Signature) vulnerabilities →