CVE-2026-8937Network attack vectorHinoki check available

Private issue disclosure via unchecked epic links

Published Sep 29, 2026 · Updated Sep 29, 2026

GitLab CE/EE 19.0 through 19.2.6, 19.3 through 19.3.2, and 19.4.0 expose private child issues to remote authenticated users. The Epic Issues REST API omits authorization checks on work items linked to a visible epic, returning issue titles and descriptions from projects the caller cannot access. Exploitation requires an account and a visible epic linked to otherwise inaccessible issues; the reported consequence is disclosure, not modification.

CVSS severity4.3
Medium
EPSS probability0.26%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

GitLab CE/EE 19.0 through 19.2.6, 19.3 through 19.3.2, and 19.4.0 expose private child issues to remote authenticated users. The Epic Issues REST API omits authorization checks on work items linked to a visible epic, returning issue titles and descriptions from projects the caller cannot access. Exploitation requires an account and a visible epic linked to otherwise inaccessible issues; the reported consequence is disclosure, not modification.

The record

CVE
CVE-2026-8937
Published
Sep 29, 2026
Updated
Sep 29, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-862, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 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=19.0 <19.2.7
  2. Affected versionversion=19.3 <19.3.3
  3. Affected versionversion=19.4 <19.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=19.0 <19.2.7; version=19.3 <19.3.3; version=19.4 <19.4.1

Published CVSS scores

4.3GitLabCVSS: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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1213Data from Information Repositories

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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