CVE-2023-3949Public exploitNetwork attack vector

Release-description disclosure via unguarded Atom rendering

Published Dec 1, 2023 · Updated Nov 20, 2025

Information disclosure in GitLab allows remote attackers to read project-member-only release descriptions through a public Atom feed. The tags Atom renderer includes each linked release description without enforcing the release-visibility authorization used by the HTML release and tags views. The project must be public and release access must be restricted to project members; exposure is limited to release-description confidentiality.

CVSS severity5.3
Medium
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in GitLab allows remote attackers to read project-member-only release descriptions through a public Atom feed. The tags Atom renderer includes each linked release description without enforcing the release-visibility authorization used by the HTML release and tags views. The project must be public and release access must be restricted to project members; exposure is limited to release-description confidentiality.

The record

CVE
CVE-2023-3949
Published
Dec 1, 2023
Updated
Nov 20, 2025
Vendor
GitLab
Product
GitLab
Classifications
CWE-201, T1190, T1213.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 20, 2025Record 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=11.3 <16.4.3
  2. Affected versionversion=16.5 <16.5.3
  3. Affected versionversion=16.6 <16.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GitLab · GitLabversion=11.3 <16.4.3; version=16.5 <16.5.3; version=16.6 <16.6.1

Published CVSS scores

5.3GitLabCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-201Insertion of Sensitive Information Into Sent Data
T1190Exploit Public-Facing Application
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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