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VulnerabilityPublished

CVE-2026-57295: Jenkins EC2 Fleet Plugin · Cross-Site Request Forgery

Affects Jenkins EC2 Fleet PluginSource CVE Database V5

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Not known to be exploited · CVSS 5.4 Medium · patch available : update Jenkins EC2 Fleet Plugin when convenient.

Data as of 6 Nov 2026, 23:24 UTC

CVSS 3.1 base score
5.4Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 24 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Jenkins ProjectJenkins EC2 Fleet PluginAffected
  • <=4.2.3.539.v8fedff2a_81c3
Fixed in–

AI-suggested

A patch is available for this vulnerability. Since the Jenkins EC2 Fleet Plugin is a cloud-hosted service, the vendor manages remediation server-side. Users should verify with the vendor advisory that their service instance has been updated to address this vulnerability.

Description

A cross-site request forgery (CSRF) vulnerability in Jenkins EC2 Fleet Plugin 4.2.3.539.v8fedff2a_81c3 and earlier allows attackers to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing AWS credentials stored in Jenkins.

References

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