Low severity2.7GHSA Advisory· Published Feb 2, 2026· Updated Apr 15, 2026

CVE-2026-1518

Description

A flaw was found in Keycloak’s CIBA feature where insufficient validation of client-configured backchannel notification endpoints could allow blind server-side requests to internal services.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
org.keycloak:keycloak-parentMaven	<= 26.5.2	—

Affected products

Keycloak/KeycloakGHSA
Range: <= 26.5.2

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

github.com/advisories/GHSA-fwhw-chw4-gh37ghsaADVISORY
nvd.nist.gov/vuln/detail/CVE-2026-1518ghsaADVISORY
access.redhat.com/security/cve/CVE-2026-1518nvdWEB
bugzilla.redhat.com/show_bug.cginvdWEB

News mentions

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cvss	0.176
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000