CVE-2025-13335Public exploitNetwork attack vector

Authenticated service interruption via unnormalized Wiki redirects

Published Jan 22, 2026 · Updated Jan 22, 2026

Infinite redirect loop in affected GitLab CE/EE releases allows remote authenticated users to interrupt service through crafted Wiki redirects. The find_redirection function in wiki_actions.rb compares raw redirect paths in a seen set without normalizing equivalent forms, so /C and /C/ evade cycle detection and recur until requests exhaust resources. A regular account that can create a project Wiki and push a crafted .gitlab/redirects.yml file can drive repeated requests that make the self-managed instance unavailable; affected ranges are 17.1 through 18.6.3, 18.7 through 18.7.1, and 18.8 through 18.8.1.

CVSS severity6.5
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Infinite redirect loop in affected GitLab CE/EE releases allows remote authenticated users to interrupt service through crafted Wiki redirects. The find_redirection function in wiki_actions.rb compares raw redirect paths in a seen set without normalizing equivalent forms, so /C and /C/ evade cycle detection and recur until requests exhaust resources. A regular account that can create a project Wiki and push a crafted .gitlab/redirects.yml file can drive repeated requests that make the self-managed instance unavailable; affected ranges are 17.1 through 18.6.3, 18.7 through 18.7.1, and 18.8 through 18.8.1.

The record

CVE
CVE-2025-13335
Published
Jan 22, 2026
Updated
Jan 22, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-835, T1499.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 22, 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=17.1 <18.6.4
  2. Affected versionversion=18.7 <18.7.2
  3. Affected versionversion=18.8 <18.8.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=17.1 <18.6.4; version=18.7 <18.7.2; version=18.8 <18.8.2

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 exploitPublished

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499.003Application Exhaustion Flood

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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