# CVE-2026-53435: Jenkins Project Jenkins

- Exploited (CISA KEV): no
- Published: 2026-06-10
- CVSS: 8.8 HIGH (v3.1)
- EPSS: 53.1% (99th percentile)

In Jenkins 2.567 and earlier, LTS 2.555.2 and earlier, it is possible for attackers to have Jenkins deserialize arbitrary types defined in Jenkins core or plugins from an attacker-controlled `config.xml` submission in a way that allows them to handle HTTP requests afterwards.
This can be used to impersonate any user and send HTTP requests on their behalf, up to and including use of the Script Console to run arbitrary code, or to read arbitrary files from the Jenkins controller.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | No public claim | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2026-09-16 | 98 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### F5

- 2026-09-16 · new · rule 200007120
  > Added: signature 200007120 "Jenkins Arbitrary File Read (1)" (Path Traversal, risk High), systems: Jenkins. References: CVE-2026-53435.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2026-09-16 · new · rule 200007121
  > Added: signature 200007121 "Jenkins Arbitrary File Read (2)" (Path Traversal, risk High), systems: Jenkins. References: CVE-2026-53435.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2026-53435 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2026-53435