CVE-2026-32883

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{"bugzilla": {"description": "Botan: Botan: Compromised certificate validation integrity via unverified OCSP response signatures", "id": "2453204", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2453204"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N", "status": "draft"}, "cwe": "CWE-347", "details": ["A flaw was found in Botan. A remote attacker could exploit a vulnerability in the X509 path validation process where the signature of Online Certificate Status Protocol (OCSP) responses was not verified. This omission allows an attacker to provide forged OCSP responses, potentially leading to the acceptance of revoked certificates and compromising the integrity of the certificate validation."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-32883", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "rust-sequoia-sq", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "rust-sequoia-sqv", "product_name": "Red Hat Enterprise Linux 10"}], "public_date": "2026-03-30T20:36:30Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-32883\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-32883\nhttps://github.com/randombit/botan/security/advisories/GHSA-9j2j-hqmc-hf5x"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.0.0,3.11.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "botan", "source": "cna", "vendor": "randombit"}, "product": "botan", "vendor": "randombit"}], "analysis": {"en": {"generated_at": "2026-04-13T16:09:24.336983+00:00", "value": {"mitigation_remediation": ["Upgrade to Botan 3.11.0 or later", "If upgrade is not feasible, configure applications to ignore OCSP revocation checks or restrict network access to OCSP endpoints", "Verify no older Botan versions are in the application stack", "Check the vendor\u2019s website for additional security advisories and verify the library\u2019s integrity"], "summary": {"action": "Apply Patch", "impact": "Certificate Revocation Bypass"}, "threat_synthesis": {"affected_systems": "This issue affects the Cryptography Library Botan developed by randombit. Versions starting from 3.0.0 up to, but not including, 3.11.0 are vulnerable. The patch that fixes the problem was released in Botan 3.11.0.", "description_and_impact": "The vulnerability in the Botan cryptography library arises from missing verification of the OCSP response signature during X509 path validation in versions 3.0.0 through 3.10.x. Because the library does not check that the OCSP response is properly signed, an attacker can supply a forged response that indicates a certificate is valid even when it has been revoked. This flaw allows a man\u2011in\u2011the\u2011middle attacker to bypass certificate revocation checks, potentially compromising the confidentiality and integrity of secure communications.", "risk_and_exploitability": "The CVSS score is 5.9, indicating moderate severity. The EPSS score is below 1%, suggesting a low likelihood of exploitation. The flaw is not listed in the CISA Known Exploited Vulnerabilities catalog. An attacker would need to deliver a crafted OCSP response to a software component that trusts the botan library. Usually this would occur over a network path where the application performs certificate validation, so the attack vector is inferred to be remote network\u2011based. Exploitation requires that the application accept the forged response as valid, which it will if the library is in the affected version range."}}}}, "created": "2026-03-31T19:59:51.648232+00:00", "updated": "2026-04-14T16:42:31.488364+00:00", "vendors": ["randombit", "randombit$PRODUCT$botan"]}