CVE-2026-86231
LowCVSS 3.7Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
Vulnerability in mwiede jsch up to version 2.28.5. The getRevokedKeys function in KnownHosts.java is vulnerable to improper check for certificate revocation via the known_hosts argument. The attack can be performed remotely but has high complexity and is difficult to exploit. Upgrading to version 2.28.6 is recommended.
Risk Assessment
Risk of accepting revoked certificates, potentially leading to unauthorized access.
Recommendation
Upgrade mwiede jsch to version 2.28.6 or apply the available patch.
Related vulnerabilities
- CVE-2026-42417Critical
Unauthenticated SQL Injection vulnerability in ARMember Premium versions up to 7.8. An attacker without authentication can manipulate database queries.
- CVE-2026-42415Critical
Unauthenticated SQL Injection vulnerability in Porto Theme - Functionality versions up to 3.9.3. An attacker can execute unauthorized database queries.
- CVE-2026-41555Critical
Unauthenticated SQL Injection vulnerability in Newsletter Subscription Form – User Subscriptions Form, Capture Email versions up to 1.5.9. An attacker can inject malicious SQL queries.
- CVE-2026-39797Critical
Unauthenticated PHP Object Injection vulnerability in GDPR Framework By Data443 versions up to 2.5.0. An attacker can inject malicious PHP objects, potentially leading to code execution.
- CVE-2026-39795Critical
Unauthenticated SQL Injection vulnerability in SendPress Newsletters versions up to 1.26.1.20. An attacker can perform unauthorized database operations.
- CVE-2026-39785Critical
Unauthenticated SQL Injection vulnerability in Gmedia Photo Gallery versions up to 1.25.1. An attacker can manipulate SQL queries without authentication.
- CVE-2026-39773Critical
Unauthenticated Privilege Escalation vulnerability in Doctreat Core versions up to 1.7.0. An attacker without authentication can gain elevated privileges.
- CVE-2026-39770Critical
Unauthenticated Arbitrary File Upload vulnerability in Doctreat versions up to 1.7.0. An attacker can upload malicious files without authentication.
- CVE-2026-39764Critical
Unauthenticated SQL Injection vulnerability in Radius Booking — Booking Calendar for Appointments & Services versions up to 1.0.19. An attacker can inject SQL queries.
- CVE-2026-39761Critical
Unauthenticated Privilege Escalation vulnerability in Meta Box AIO versions up to 3.7.1. An attacker without authentication can gain higher privileges.
Original NVD description (English source)
A security flaw has been discovered in mwiede jsch up to 2.28.5. Affected is the function getRevokedKeys of the file src/main/java/com/jcraft/jsch/KnownHosts.java. Performing a manipulation of the argument known_hosts results in improper check for certificate revocation. The attack is possible to be carried out remotely. The attack is considered to have high complexity. The exploitability is told to be difficult. The exploit has been released to the public and may be used for attacks. Upgrading to version 2.28.6 is able to address this issue. The patch is named 194a2f76a5c0f1c3f778565be3fd66bcafc42d23. You should upgrade the affected component.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS