HOMEVULNERABILITIESCVE-2026-9793
HIGH

CVE-2026-9793

CWE-347Published: May 28, 2026· Updated: Jun 3, 2026

7.5
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:4.3th

Official 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.

NVD Source

Technical Analysis

CVE-2026-9793 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

Red Hat1 product
build of keycloak
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

ADVISORYhttps://access.redhat.com/security/cve/CVE-2026-9793
ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=2482460

All References (2)

→
https://access.redhat.com/security/cve/CVE-2026-9793Vendor Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=2482460Issue Tracking · Vendor Advisory

Quick Facts

CVE IDCVE-2026-9793
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-347
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedMay 28, 2026

Related CVEs (CWE-347)

CVE-2026-48558
KEV10.0
CVE-2026-44748
9.9
CVE-2026-28802
9.8
CVE-2026-6911
9.8
CVE-2026-32974
9.8
CVE-2026-58426
9.6

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-9793 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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