CVE-2026-58062

CRITICAL

Stapled OCSP response accepted without binding to the checked certificate

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-58062. PoCs published by xiaoqiMikko.

AI-analyzed exploit summary This repository provides a Java-based scanner tool to detect vulnerable versions of Bouncy Castle libraries (CVE-2026-58062 and related CVEs) in JAR/WAR files or Maven coordinates. It performs static analysis of artifact metadata, manifests, and filenames to assess exposure to disclosed vulnerabilities without exploiting them.

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).

Exploits (1)

nomisec SCANNER
by xiaoqiMikko · poc
https://github.com/xiaoqiMikko/bc-check

This repository provides a Java-based scanner tool to detect vulnerable versions of Bouncy Castle libraries (CVE-2026-58062 and related CVEs) in JAR/WAR files or Maven coordinates. It performs static analysis of artifact metadata, manifests, and filenames to assess exposure to disclosed vulnerabilities without exploiting them.

Classification
Scanner 99%
Attack Type
Other
Complexity
Moderate
Reliability
Reliable
Target: Bouncy Castle (BC, BC-LTS, BC-FIPS) versions affected by CVE-2026-58062 and related CVEs (e.g., 2026 batch)
No auth needed
Prerequisites: Access to target JAR/WAR files or Maven coordinates · Java runtime environment to execute the scanner
mistral-large-3 · analyzed Aug 10, 2026 Full analysis →

Scores

CVSS v4 9.3
EPSS 0.0020
EPSS Percentile 10.4%
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:X/V:X/RE:X/U:Amber

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-295
Status published
Products (4)
Legion of the Bouncy Castle Inc./BC-FJA 2.0.0 - 2.0.2
Legion of the Bouncy Castle Inc./BC-FJA 2.1.0 - 2.1.3
Legion of the Bouncy Castle Inc./BC-JAVA 1.66 - 1.85
Legion of the Bouncy Castle Inc./BC-LTS-JAVA 2.73.0 - 2.73.12
Published Aug 03, 2026
Tracked Since Aug 03, 2026