Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-59847

CVE-2026-59847HIGH

Red Hat Red Hat Enterprise Linux 10 — Libssh: libssh: integrity downgrade via openssl aes-gcm tag verification

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  H  N    7.5   .0033   24.2     —

AFFECTED
  Product                      Versions     Fixed
  Red Hat Enterprise Linux 10  unspecified  0:0.12.0-3.el10_2
  Red Hat Enterprise Linux 8   unspecified  0:0.9.6-17.el8_10
  Red Hat Enterprise Linux 8   unspecified  0:0.9.6-17.el8_10
  Red Hat Enterprise Linux 9   unspecified  0:0.10.4-19.el9_8
  Red Hat Enterprise Linux 9   unspecified  0:0.10.4-19.el9_8
  Red Hat Hardened Images      unspecified  0.12.1-4.hum1

TIMELINE
  Jul 7   Reserved by redhat
  Jul 21  Published (CNA: redhat)
  Aug 17  RESCORED — CVE-2026-59847 (Red Hat Enterprise Linux 10). CVSS 5.9 → 7.5 (NVD).

CWE-253, CWE-1310 · CNA: redhat · CVSS v3.1 · 6 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 7, 2026	Reserved	Reserved by redhat
July 21, 2026	Published	Published (CNA: redhat)
August 17, 2026	RESCORED	RESCORED — CVE-2026-59847 (Red Hat Enterprise Linux 10). CVSS 5.9 → 7.5 (NVD).

Affected

Affected products and packages — 6 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Red Hat	Red Hat Enterprise Linux 10	—	—	0:0.12.0-3.el10_2
Red Hat	Red Hat Enterprise Linux 8	—	—	0:0.9.6-17.el8_10
Red Hat	Red Hat Enterprise Linux 8	—	—	0:0.9.6-17.el8_10
Red Hat	Red Hat Enterprise Linux 9	—	—	0:0.10.4-19.el9_8
Red Hat	Red Hat Enterprise Linux 9	—	—	0:0.10.4-19.el9_8
Red Hat	Red Hat Hardened Images	—	—	0.12.1-4.hum1

Weaknesses

CWE-253 · CWE-1310

References (6)

https://access.redhat.com/errata/RHSA-2026:42922 [Third Party Advisory]
https://access.redhat.com/errata/RHSA-2026:55855 [Third Party Advisory]
https://access.redhat.com/errata/RHSA-2026:62217 [Third Party Advisory]
https://access.redhat.com/errata/RHSA-2026:62218 [Third Party Advisory]
https://access.redhat.com/security/cve/CVE-2026-59847 [Third Party Advisory]
https://bugzilla.redhat.com/show_bug.cgi?id=2498180 [Issue Tracking, Third Party Advisory]

Authoritative record: CVE-2026-59847 at cve.org

Vendors: red hat

Weaknesses: CWE-253 · CWE-1310

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-59847 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.