CVE-2026-9793 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-9793HIGH

Red Hat Red Hat build of Keycloak 26.4 — Keycloak: keycloak: security policy bypass in jwe-encrypted request object processing

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  H  N    7.5   .0016    5.5     —

AFFECTED
  Product                            Versions     Fixed
  Red Hat build of Keycloak 26.4     unspecified  26.4.14-1
  Red Hat build of Keycloak 26.4     unspecified  26.4-22
  Red Hat build of Keycloak 26.4     unspecified  26.4-22
  Red Hat build of Keycloak 26.4.14  unspecified  —
  Red Hat build of Keycloak 26.6     unspecified  26.6.5-1
  Red Hat build of Keycloak 26.6     unspecified  26.6-11
  Red Hat build of Keycloak 26.6     unspecified  26.6-11
  Red Hat build of Keycloak 26.6.5   unspecified  —

TIMELINE
  May 28  Reserved by redhat
  May 28  Published (CNA: redhat)
  Aug 5   RESCORED — CVE-2026-9793 (Red Hat build of Keycloak 26.4). CVSS 5.9 → 7.5 (NVD).

CWE-347 · CNA: redhat · CVSS v3.1 · 6 references · NVD status: Modified

Description

A flaw was found in Keycloak. When a JSON Web Encryption (JWE) encrypted request object is submitted, Keycloak may incorrectly process unsigned claims if the decrypted content is raw JSON, bypassing the configured signature policy. This allows a remote attacker to submit unauthorized claims, leading to a compromise of data integrity within the OpenID Connect (OIDC) authorization flow. While a redirect URI allowlist acts as a compensating control, this vulnerability violates OIDC Core and Financial-grade API (FAPI) signing requirements.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
May 28, 2026	Reserved	Reserved by redhat
May 28, 2026	Published	Published (CNA: redhat)
August 5, 2026	RESCORED	RESCORED — CVE-2026-9793 (Red Hat build of Keycloak 26.4). CVSS 5.9 → 7.5 (NVD).

Affected

Affected products and packages — 8 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Red Hat	Red Hat build of Keycloak 26.4	—	—	26.4.14-1
Red Hat	Red Hat build of Keycloak 26.4	—	—	26.4-22
Red Hat	Red Hat build of Keycloak 26.4	—	—	26.4-22
Red Hat	Red Hat build of Keycloak 26.4.14	—	—	—
Red Hat	Red Hat build of Keycloak 26.6	—	—	26.6.5-1
Red Hat	Red Hat build of Keycloak 26.6	—	—	26.6-11
Red Hat	Red Hat build of Keycloak 26.6	—	—	26.6-11
Red Hat	Red Hat build of Keycloak 26.6.5	—	—	—

Weaknesses

CWE-347

References (6)

https://access.redhat.com/errata/RHSA-2026:50846
https://access.redhat.com/errata/RHSA-2026:50847
https://access.redhat.com/errata/RHSA-2026:50848
https://access.redhat.com/errata/RHSA-2026:50849
https://access.redhat.com/security/cve/CVE-2026-9793 [Vendor Advisory]
https://bugzilla.redhat.com/show_bug.cgi?id=2482460 [Issue Tracking, Vendor Advisory]

Authoritative record: CVE-2026-9793 at cve.org

Vendors: red hat

Weaknesses: CWE-347

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-9793 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 Wednesday, August 19, 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.