CVE-2026-15387Network attack vector

Policy job environment manipulation via untrusted dependencies

Published Aug 26, 2026 · Updated Aug 26, 2026

Untrusted-data acceptance in GitLab 19.1 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 allows remote authenticated users to alter CI jobs. Pipeline Execution Policy enforcement accepts job dependencies that can influence its execution environment instead of isolating trusted policy jobs from developer-controlled dependency data. Developer-role access and unspecified conditions are required; the documented consequence is limited to integrity of the policy enforcement job environment.

CVSS severity4.3
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Untrusted-data acceptance in GitLab 19.1 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 allows remote authenticated users to alter CI jobs. Pipeline Execution Policy enforcement accepts job dependencies that can influence its execution environment instead of isolating trusted policy jobs from developer-controlled dependency data. Developer-role access and unspecified conditions are required; the documented consequence is limited to integrity of the policy enforcement job environment.

The record

CVE
CVE-2026-15387
Published
Aug 26, 2026
Updated
Aug 26, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-349, T1562.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=19.1 <19.1.7
  2. Affected versionversion=19.2 <19.2.5
  3. Affected versionversion=19.3 <19.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=19.1 <19.1.7; version=19.2 <19.2.5; version=19.3 <19.3.1

Published CVSS scores

4.3GitLabCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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-349Acceptance of Extraneous Untrusted Data With Trusted Data
T1562.001Impair Defenses: Disable or Modify Tools

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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