CVE-2026-26056 json
Arbitrary WASM Code Execution via AnnotationOverrideFlight Injection in Yoke ATC
published 8mo ago modified 4mo ago also GHSA-wj8p-jj64-h7ff , GO-2026-4493 , EUVD-2026-6191
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
Yoke is a Helm-inspired infrastructure-as-code (IaC) package deployer. In 0.19.0 and earlier, a vulnerability exists in the Air Traffic Controller (ATC) component of Yoke. It allows users with CR create/update permissions to execute arbitrary WASM code in the ATC controller context by injecting a malicious URL through the overrides.yoke.cd/flight annotation. The ATC controller downloads and executes the WASM module without proper URL validation, enabling attackers to create arbitrary Kubernetes resources or potentially escalate privileges to cluster-admin level.
Patch / fix
- govulncheck-vulndb openSUSE Leap 15.6 0.0.20260226T182644-150000.1.149.1
suse advisories SUSE-SU-2026:0757-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
Is CVE-2026-26056 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 8mo ago
Exploit prediction
0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/yokecd/yoke/security/advisories/GHSA-wj8p-jj64-h7ff referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/yokecd/yoke | <=0.19.0 all versions |
no fix listed |
Affected products
- yokecd yoke
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
github.com
/yokecd/yoke/security/advisories/GHSA-wj8p-jj64-h7ff
web, exploit, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-26056
advisory
-
github.com
/yokecd/yoke
package
Sources
- CVE List CVE-2026-26056
- GitHub Advisory GHSA-wj8p-jj64-h7ff
- NVD CVE-2026-26056
- OSV GO-2026-4493
Fencer Intel 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.