CVE & CISA-KEV CatalogNVD
CVE-2026-9087
MEDIUM6.4
CVSS v3
Description
A flaw was found in Keycloak. The cross-session verification proof is keyed only by (local userId, idpAlias) and is not bound to the upstream identity that was actually verified, so a second upstream account on the same IdP can consume it and get linked to the victim's local account.
How to fix
Remediation Available
rhbk/keycloakRed Hat / RHEL
Fixed in:rhel9@sha256:acdf471dd72130f542d96f2066de14cee987d8d7c3c18eebfe7a9f6dd3ddcb8b_ppc64leRHSA-2026:25097
Fixed in:rhel9-operator@sha256:3e7730250bf4e80e6097bf585f6c56d26296abfd3a895b705fcb954fff5a6223_ppc64leRHSA-2026:25097
Fixed in:rhel9@sha256:749a914cbd258815ac1fb6ca8f6e8624c30c6b411a6f6f00f7204e6e9d053c79_arm64RHSA-2026:25097
Fixed in:rhel9-operator@sha256:091b92f4afb1a23d0fc927e4160e824237b46128ea700ceeba6a8197f2952e6f_arm64RHSA-2026:25097
Fixed in:rhel9@sha256:99222593645c093307b570651213c1695f74f7782f6922900688f8c4183d0c2c_amd64RHSA-2026:25097
Fixed in:operator-bundle@sha256:b32c3aaa65f4ea0ef5eca9ea14ba20f7a382a625acfeebf2b9f604caeaea143d_amd64RHSA-2026:25097
Fixed in:rhel9-operator@sha256:7230f239140c1e843bd0939ba086a285a183e3ed6c47b7fa72d55204f7fd5e54_amd64RHSA-2026:25097
Fixed in:rhel9@sha256:7e81ba378ddeb63a1a2fd2b85e9302a6430b44614a519e942bf410b376adc071_s390xRHSA-2026:25097
Fixed in:rhel9-operator@sha256:c71e3d3785552cb3f18bca097c7dac638fbc6e4d7af470da22b910181c0202c8_s390xRHSA-2026:25097
Fixed in:rhel9-operator@sha256:502c9e94ad138d062ca6e81de89284f5bcc0d27595b193498cf35f7e1bff9a40_amd64RHSA-2026:30050
Fixed in:rhel9@sha256:05b207815e7e032115df73466875ac10436fb304bec7322e7a0a1a919901fdab_arm64RHSA-2026:30050
Fixed in:operator-bundle@sha256:dc6f5cde01bde313152b99cbead708160e43be14804f0ff768123fa9f54b4a4b_amd64RHSA-2026:30050
Fixed in:rhel9-operator@sha256:c56fdf74f5055b2ed0aa1a5706f1fe5428692aaa4d107d2081fb7c6ee7d5ace0_s390xRHSA-2026:30050
Fixed in:rhel9@sha256:183d2a02d613de6745e0741333c4d34d8544b74866efac9237c46f26114b8c66_ppc64leRHSA-2026:30050
Fixed in:rhel9@sha256:d94079e34e41affcb63b6094781e9e0bb0c1e15ae2f24c93ad7bf6353937ec9a_s390xRHSA-2026:30050
Fixed in:rhel9-operator@sha256:8b4788a5f7e7687f3cc98a80407057a915d516aa79ff2e879780fa13e3be738f_ppc64leRHSA-2026:30050
Fixed in:rhel9@sha256:70634542b3ae6f9c0593bd6a63d2e9fa4667c27d1cbf78c07bee4b1ebc1b6706_amd64RHSA-2026:30050
Fixed in:rhel9-operator@sha256:bb723943f57bf3f1b02f8b67e3aff2043b30f867dbf90155a5596b954073f57e_arm64RHSA-2026:30050
rhbk/keycloakRocky
Fixed in:rhel9@sha256:acdf471dd72130f542d96f2066de14cee987d8d7c3c18eebfe7a9f6dd3ddcb8b_ppc64leRHSA-2026:25097
Fixed in:rhel9-operator@sha256:3e7730250bf4e80e6097bf585f6c56d26296abfd3a895b705fcb954fff5a6223_ppc64leRHSA-2026:25097
Fixed in:rhel9@sha256:749a914cbd258815ac1fb6ca8f6e8624c30c6b411a6f6f00f7204e6e9d053c79_arm64RHSA-2026:25097
Fixed in:rhel9-operator@sha256:091b92f4afb1a23d0fc927e4160e824237b46128ea700ceeba6a8197f2952e6f_arm64RHSA-2026:25097
Fixed in:rhel9@sha256:99222593645c093307b570651213c1695f74f7782f6922900688f8c4183d0c2c_amd64RHSA-2026:25097
Fixed in:operator-bundle@sha256:b32c3aaa65f4ea0ef5eca9ea14ba20f7a382a625acfeebf2b9f604caeaea143d_amd64RHSA-2026:25097
Fixed in:rhel9-operator@sha256:7230f239140c1e843bd0939ba086a285a183e3ed6c47b7fa72d55204f7fd5e54_amd64RHSA-2026:25097
Fixed in:rhel9@sha256:7e81ba378ddeb63a1a2fd2b85e9302a6430b44614a519e942bf410b376adc071_s390xRHSA-2026:25097
Fixed in:rhel9-operator@sha256:c71e3d3785552cb3f18bca097c7dac638fbc6e4d7af470da22b910181c0202c8_s390xRHSA-2026:25097
Fixed in:rhel9-operator@sha256:502c9e94ad138d062ca6e81de89284f5bcc0d27595b193498cf35f7e1bff9a40_amd64RHSA-2026:30050
Fixed in:rhel9-operator@sha256:8b4788a5f7e7687f3cc98a80407057a915d516aa79ff2e879780fa13e3be738f_ppc64leRHSA-2026:30050
Fixed in:operator-bundle@sha256:dc6f5cde01bde313152b99cbead708160e43be14804f0ff768123fa9f54b4a4b_amd64RHSA-2026:30050
Fixed in:rhel9@sha256:183d2a02d613de6745e0741333c4d34d8544b74866efac9237c46f26114b8c66_ppc64leRHSA-2026:30050
Fixed in:rhel9@sha256:05b207815e7e032115df73466875ac10436fb304bec7322e7a0a1a919901fdab_arm64RHSA-2026:30050
Fixed in:rhel9@sha256:d94079e34e41affcb63b6094781e9e0bb0c1e15ae2f24c93ad7bf6353937ec9a_s390xRHSA-2026:30050
Fixed in:rhel9-operator@sha256:c56fdf74f5055b2ed0aa1a5706f1fe5428692aaa4d107d2081fb7c6ee7d5ace0_s390xRHSA-2026:30050
Fixed in:rhel9@sha256:70634542b3ae6f9c0593bd6a63d2e9fa4667c27d1cbf78c07bee4b1ebc1b6706_amd64RHSA-2026:30050
Fixed in:rhel9-operator@sha256:bb723943f57bf3f1b02f8b67e3aff2043b30f867dbf90155a5596b954073f57e_arm64RHSA-2026:30050
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredLow
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
Exploit Intelligence
0.31%probability of exploitation in 30 days
23rdpercentile
Low risk: more likely to be exploited than 23% of all known CVEs.
References
Vendor Advisory2
Other references4
Related Vulnerabilities
Other CWE-639 (Authorization Bypass Through User-Controlled Key) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2023-6875 | Critical | 9.8 | 90% | - | - |
| CVE-2024-46982 | High | 7.5 | 61% | - | Fix |
| CVE-2021-45428 | Critical | 9.8 | 57% | - | - |
| CVE-2019-17382 | Critical | 9.1 | 54% | - | Fix |
| CVE-2019-13360 | Critical | 9.8 | 24% | - | - |
| CVE-2023-48783 | Medium | 5.4 | 22% | - | Fix |
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-26.