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Vulnerability record · CVE-2026-58062 · published 3 August 2026

CVE-2026-58062: Bouncycastle bc-java improper certificate validation vulnerability

Bouncycastle · Bc Java

In Bouncy Castle for Java before 1.85, Stapled OCSP response accepted without binding to the checked certificate. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).

9.3 CVSS 4.0 Critical EPSS 0.27% · top 82.3% CWE-295 · Improper certificate validation
9.3CVSS 4.0 base score
0.27%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
2References
2 Sep 2026Last modified by NVD

Description

In Bouncy Castle for Java before 1.85, Stapled OCSP response accepted without binding to the checked certificate. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/bcgit/bc-java/commit/add5f822660f3b2c29fd824e2f4095469c42a1c7 Patch
https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9058062 Third Party AdvisoryPatch

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-58062), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.