CVE-2026-57298Network attack vector

Unauthorized outbound connections via forged connection test

Published Jun 24, 2026 · Updated Jun 24, 2026

CSRF in Jenkins Contrast Continuous Application Security Plugin 3.11 and earlier allows attackers to trigger outbound TeamServer connections. The TeamServer connection-test endpoint accepts requests without requiring POST, allowing a forged request to supply the destination URL and credentials. Overall/Read permission is sufficient to reach the endpoint; the bounded result is an outbound connection using an attacker-chosen username, API key, and service key.

CVSS severity5.4
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in Jenkins Contrast Continuous Application Security Plugin 3.11 and earlier allows attackers to trigger outbound TeamServer connections. The TeamServer connection-test endpoint accepts requests without requiring POST, allowing a forged request to supply the destination URL and credentials. Overall/Read permission is sufficient to reach the endpoint; the bounded result is an outbound connection using an attacker-chosen username, API key, and service key.

The record

CVE
CVE-2026-57298
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
Jenkins Project
Product
Contrast Continuous Application Security Plugin
Classifications
CWE-352, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=3.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jenkins Project · Contrast Continuous Application Security Pluginversion=0 <=3.11

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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