CVE-2023-4532Public exploitNetwork attack vector

Private CI/CD metadata disclosure via unchecked job linking

Published Sep 29, 2023 · Updated Apr 26, 2026

Incorrect authorization in GitLab allows remote authenticated users to disclose private CI/CD job names and triggering usernames. The handle_build_metadata function accepts any valid gitlab.CI_JOB_ID tag and links that job to an attacker's machine-learning experiment without checking job access. An account able to create an experiment and guess the incremental job ID can view those two fields from a private project without project membership.

CVSS severity4.3
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in GitLab allows remote authenticated users to disclose private CI/CD job names and triggering usernames. The handle_build_metadata function accepts any valid gitlab.CI_JOB_ID tag and links that job to an attacker's machine-learning experiment without checking job access. An account able to create an experiment and guess the incremental job ID can view those two fields from a private project without project membership.

The record

CVE
CVE-2023-4532
Published
Sep 29, 2023
Updated
Apr 26, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-863, T1213.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 26, 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=16.2 <16.2.8
  2. Affected versionversion=16.3 <16.3.5
  3. Affected versionversion=16.4 <16.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=16.2 <16.2.8; version=16.3 <16.3.5; version=16.4 <16.4.1

Published CVSS scores

4.3GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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 exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1213.003Code Repositories

Public exploit references

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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