CVE-2026-40868 json
kyverno apicall servicecall implicit bearer token injection leaks kyverno serviceaccount token
published 2026-04-14 6 mo ago modified 2026-09-10 1 mo ago also BIT-kyverno-2026-40868 , EUVD-2026-24237 , GHSA-q93q-v844-jrqp , GO-2026-5575
- cvss
- 8.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
Summary
Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to 1.16.4, kyverno’s apiCall servicecall helper implicitly injects Authorization: Bearer ... using the kyverno controller serviceaccount token when a policy does not explicitly set an Authorization header. Because context.apiCall.service.url is policy-controlled, this can send the kyverno serviceaccount token to an attacker-controlled endpoint (confused deputy). Namespaced policies are blocked from servicecall usage by the namespaced urlPath gate in pkg/engine/apicall/apiCall.go, so this report is scoped to ClusterPolicy and global context usage. This vulnerability is fixed in 1.16.4.
Patch / fix
- go github.com/kyverno/kyverno 1.17.0
- bitnami kyverno 1.16.4
- kyverno kyverno 1.16.4
- nirmata kyverno 1.16.4
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 6 mo ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/kyverno/kyverno/security/advisories/GHSA-q93q-v844-jrqp referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| GitHub | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| OSV | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/kyverno/kyverno | <1.17.0 |
1.17.0 |
| bitnami | kyverno | <1.16.4 |
1.16.4 |
Affected products
- kyverno kyverno
Classification
References
-
github.com
/kyverno/kyverno/security/advisories/GHSA-q93q-v844-jrqp
exploit, web, mitigation, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-40868
advisory, web
-
github.com
/kyverno/kyverno
package
Sources
- CVE List CVE-2026-40868
- GitHub Advisory GHSA-q93q-v844-jrqp
- NVD CVE-2026-40868
- OSV BIT-kyverno-2026-40868
- OSV GO-2026-5575
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.