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CVE-2026-9704

A flaw was found in Keycloak. An authenticated user with low privileges can exploit this vulnerability by sending an oversized subject_token JSON Web Token (JWT) to the TokenEndpoint. When the token exceeds a 4000-character limit, it is silently dropped, causing the system to fall back to client credentials. This allows the user to gain the permissions of the client's service account, leading to privilege escalation.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:37bb44fce6dd1b8585146937b07716bdccd381686c6a7611ff4513d054ec9acf
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 8 assertions

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:build_keycloak:26.6::el9"],"defaultStatus":"affected","packageName":"rhbk/keycloak-rhel9","product":"Red Hat build of Keycloak 26.6","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"26.6-6","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/5

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:build_keycloak:26.4::el9"],"defaultStatus":"unaffected","packageName":"rhbk/keycloak-rhel9","product":"Red Hat build of Keycloak 26.4.13","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/3

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:build_keycloak:26.4::el9"],"defaultStatus":"affected","packageName":"rhbk/keycloak-rhel9","product":"Red Hat build of Keycloak 26.4","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"26.4-19","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/1

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:build_keycloak:26.6::el9"],"defaultStatus":"affected","packageName":"rhbk/keycloak-rhel9-operator","product":"Red Hat build of Keycloak 26.6","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"26.6-6","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/6

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:build_keycloak:26.6::el9"],"defaultStatus":"unaffected","packageName":"rhbk/keycloak-rhel9","product":"Red Hat build of Keycloak 26.6.3","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/7

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:build_keycloak:26.6::el9"],"defaultStatus":"affected","packageName":"rhbk/keycloak-operator-bundle","product":"Red Hat build of Keycloak 26.6","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"26.6.3-3","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/4

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:build_keycloak:26.4::el9"],"defaultStatus":"affected","packageName":"rhbk/keycloak-rhel9-operator","product":"Red Hat build of Keycloak 26.4","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"26.4-19","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/2

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:build_keycloak:26.4::el9"],"defaultStatus":"affected","packageName":"rhbk/keycloak-operator-bundle","product":"Red Hat build of Keycloak 26.4","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"26.4.13-1","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/0

Affected products and versions

8 source assertions
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:build_keycloak:26.6::el9"],"defaultStatus":"affected","packageName":"rhbk/keycloak-rhel9","product":"Red Hat build of Keycloak 26.6","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"26.6-6","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/5
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:build_keycloak:26.4::el9"],"defaultStatus":"unaffected","packageName":"rhbk/keycloak-rhel9","product":"Red Hat build of Keycloak 26.4.13","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/3
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:build_keycloak:26.4::el9"],"defaultStatus":"affected","packageName":"rhbk/keycloak-rhel9","product":"Red Hat build of Keycloak 26.4","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"26.4-19","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/1
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:build_keycloak:26.6::el9"],"defaultStatus":"affected","packageName":"rhbk/keycloak-rhel9-operator","product":"Red Hat build of Keycloak 26.6","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"26.6-6","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/6
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:build_keycloak:26.6::el9"],"defaultStatus":"unaffected","packageName":"rhbk/keycloak-rhel9","product":"Red Hat build of Keycloak 26.6.3","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/7
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:build_keycloak:26.6::el9"],"defaultStatus":"affected","packageName":"rhbk/keycloak-operator-bundle","product":"Red Hat build of Keycloak 26.6","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"26.6.3-3","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/4
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:build_keycloak:26.4::el9"],"defaultStatus":"affected","packageName":"rhbk/keycloak-rhel9-operator","product":"Red Hat build of Keycloak 26.4","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"26.4-19","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/2
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:build_keycloak:26.4::el9"],"defaultStatus":"affected","packageName":"rhbk/keycloak-operator-bundle","product":"Red Hat build of Keycloak 26.4","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"26.4.13-1","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-1284","description":"Improper Validation of Specified Quantity in Input","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/problemTypes/0/descriptions/0

Source references

6 source assertions
{"name":"RHSA-2026:25097","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:25097"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/references/0
{"name":"RHSA-2026:25098","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:25098"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/references/1
{"name":"RHSA-2026:30049","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:30049"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/references/2
{"name":"RHSA-2026:30050","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:30050"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/references/3
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-9704"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/references/4
{"name":"RHBZ#2481877","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2481877"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0ab3a78afb2cd4df593023e660de99d4a87ad4fb8190b1bf1eab8fbd1215eb98 · sha256:4de0e3806c5410d2… · /containers/cna/references/5

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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