Improper Certificate Validation Affecting org.bouncycastle:bcprov-debug-lts8on package, versions [,2.73.12)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published5 Aug 2026
- disclosed3 Aug 2026
- creditUnknown
Introduced: 3 Aug 2026
NewCVE-2026-58062 (opens in a new tab)How to fix?
Upgrade org.bouncycastle:bcprov-debug-lts8on to version 2.73.12 or higher.
Overview
Affected versions of this package are vulnerable to Improper Certificate Validation in the check() method of ProvOcspRevocationChecker, which verifies a stapled OCSP response's signature and then treats the certificate as unrevoked when no SingleResponse entry matches its CertID, without requiring a binding match. An attacker can present a revoked certificate that BC-based clients accept as valid by stapling any legitimately signed OCSP response from the same CA, such as a good response for a different serial number. This applies when the client uses BC revocation checking with the response supplied through the stapled PKIXRevocationChecker.setOcspResponses() path rather than fetched over the network, and the response must be validly signed by the same issuer.