CVE-2026-59847
HIGHCVSS 7.5/10EPSS 0.32%
Last modified
CVE-2026-59847 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection.. EPSS estimates a 0.32% chance of exploitation in the next 30 days.
Description
A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Libssh | Libssh | >= 0.9.0, < 0.11.5 |
| Libssh | Libssh | 0.12.0 |
| Redhat | Hardened Images | All versions |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux | 9.0 |
| Redhat | Enterprise Linux | 10.0 |
References
- https://access.redhat.com/errata/RHSA-2026:42922Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:55855Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:62217Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:62218Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2026-59847Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2498180Issue Tracking, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-59847?
A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection.
How severe is CVE-2026-59847?
CVE-2026-59847 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.
How do I fix CVE-2026-59847?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-59841A improper restriction of communication channel to intended …7.5
- CVE-2026-59842A flaw was found in libssh. During server-side GSSAPI key ex…5.3
- CVE-2026-59843A flaw was found in libssh. A remote authenticated peer can …6.5
- CVE-2026-59844A flaw was found in libssh. A remote authenticated client ca…6.5
- CVE-2026-59845A flaw was found in libssh. When ProxyCommand is used, an un…5.9
- CVE-2026-59846A flaw was found in libssh. A malicious username expanded th…3.9
- CVE-2026-59848A flaw was found in libssh. A malicious SFTP server can send…5.3
- CVE-2026-59849A flaw was found in libssh. Logic errors in automatic certif…7.5
- CVE-2026-5985A security flaw has been discovered in code-projects Simple …7.3
- CVE-2026-59850A flaw was found in libssh. If data packets are processed af…7.5
- CVE-2026-59851A flaw was found in libssh. On servers with GSSAPIKeyExchang…8.8
- CVE-2026-59853SiYuan is an open-source personal knowledge management syste…6.5
Are you affected by CVE-2026-59847?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST