CVE-2026-1402Network attack vector

Authenticated Wiki service interruption

Published May 27, 2026 · Updated May 27, 2026

Resource exhaustion in the Wiki component of affected GitLab CE/EE releases allows remote authenticated users to interrupt the service. GitLab identifies insufficient input validation in the Wiki but has not disclosed the affected request, data field, resource-consuming operation, or failure mode. A valid low-privilege account and network access are required; the published record limits the consequence to availability loss.

CVSS severity6.5
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in the Wiki component of affected GitLab CE/EE releases allows remote authenticated users to interrupt the service. GitLab identifies insufficient input validation in the Wiki but has not disclosed the affected request, data field, resource-consuming operation, or failure mode. A valid low-privilege account and network access are required; the published record limits the consequence to availability loss.

The record

CVE
CVE-2026-1402
Published
May 27, 2026
Updated
May 27, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-770, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=17.1 <18.10.7
  2. Affected versionversion=18.11 <18.11.4
  3. Affected versionversion=19.0 <19.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=17.1 <18.10.7; version=18.11 <18.11.4; version=19.0 <19.0.1

Published CVSS scores

6.5GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

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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