CVE-2026-85301: Apache Camel: Camel-Keycloak Issuer Validation Bypass When the Introspection Response Omits the iss Claim
- Is it exploited?
Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.
- How likely is exploitation in the next 30 days?
- 0.3%
Down from 0.4% on .
EPSS score, percentile 22.7 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- 4.8 Medium
CVSS v3.1 base score, given by the CNA
- What should I do?
Upgrade to Apache Camel 4.23.0, which fixes the issue. Full textSolution from the CVE record.
CISA has set no required action, because the vulnerability is not in KEV.
- Which versions are affected?
Affected
- from 4.15.0 to before 4.18.5
- from 4.19.0 to before 4.22.1
Unaffected 4.18.5; 4.22.1; 4.23.0
Source: CISA KEV 2026.10.29, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
What to do
Solution (from the CVE record)
Upgrade to Apache Camel 4.23.0, which fixes the issue. Users on the 4.18.x LTS releases stream should upgrade to 4.18.5. Users on the 4.22.x LTS releases stream should upgrade to 4.22.1. An absent iss claim is now treated as a validation failure rather than as a reason to skip the check.
Workaround (from the CVE record)
For deployments that cannot upgrade immediately, ensure the introspection endpoint returns the iss claim, and that it serves exactly one issuer.
Advisories and patches
- Fix on main, released in 4.23.0 (commit ee074873e92dde749aa183d26205b92ddc9bde2a)
- Backport to camel-4.22.x, released in 4.22.1 (commit c9e69aae7b374cc38d28c1c8dca744c1ba4d6718)
- Backport to camel-4.18.x, released in 4.18.5 (commit aba0f7551e4f63e1f37498454870a49ccdaae727)
- Apache Camel Security Advisory - CVE-2026-85301
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | from 4.15.0 to before 4.18.5 |
| Affected | from 4.19.0 to before 4.22.1 |
| Unaffected | 4.18.5 |
| Unaffected | 4.22.1 |
| Unaffected | 4.23.0 |
Versions not listed are: unaffected.
Versions the record lists as unaffected: 4.18.5, 4.22.1, 4.23.0.
Source: CVE List, as of . About the data.
About this vulnerability
Improper Authentication vulnerability in Apache Camel Keycloak component. This issue affects Apache Camel: from 4.15.0 before 4.18.5, from 4.19.0 before 4.22.1. The security processor validated the issuer of an introspected token only when the introspection response actually carried an iss claim. When the claim was absent the check was skipped rather than treated as a failure, so a token tha…
Summary: CVE record, as of .
- CISA has not added CVE-2026-85301 to its Known Exploited Vulnerabilities (KEV) catalog, as of 29 Oct 2026.
- The CVE record was published on 19 Oct 2026.
- The CVE record carries a CVSS v3.1 base score of 4.8 (Medium), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.3% (percentile 22.7), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
- CISA's SSVC assessment in the CVE record: exploitation none, automatable no, technical impact partial.
- The credits in the CVE record name Anthropic (Claude) as finder.
Source: CISA KEV 2026.10.29, as of ; CVE List, as of ; FIRST EPSS, as of . About the data.
Description
Apache Camel: Camel-Keycloak Issuer Validation Bypass When the Introspection Response Omits the iss Claim
Improper Authentication vulnerability in Apache Camel Keycloak component. This issue affects Apache Camel: from 4.15.0 before 4.18.5, from 4.19.0 before 4.22.1. The security processor validated the issuer of an introspected token only when the introspection response actually carried an iss claim. When the claim was absent the check was skipped rather than treated as a failure, so a token that the configured issuer did not mint could be accepted provided the introspection endpoint answered without naming an issuer. Reaching this requires an introspection endpoint that omits iss and accepts tokens from more than one issuer, which is not the default Keycloak arrangement, hence the low severity; where that arrangement exists the consequence is that the deployment authenticates a caller it should have rejected. Upgrade to Apache Camel 4.23.0, which fixes the issue. Users on the 4.18.x LTS releases stream should upgrade to 4.18.5. Users on the 4.22.x LTS releases stream should upgrade to 4.22.1. An absent iss claim is now treated as a validation failure rather than as a reason to skip the check. For deployments that cannot upgrade immediately, ensure the introspection endpoint returns the iss claim, and that it serves exactly one issuer.
Source: CVE List, as of . About the data.
Weakness
CWE-287
- CWE-287: Improper Authentication
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.
Timeline
| Date | Event |
|---|---|
| CVE record published |
References
1
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