CVE-2024-1736Public exploitNetwork attack vector

Authenticated service interruption via catastrophic regex backtracking

Published Jun 12, 2024 · Updated Sep 18, 2024

Regular expression denial of service in the GitLab CI/CD pipeline editor allows remote authenticated users to interrupt service. The pattern in lib/gitlab/ci/config/interpolation/block.rb applies nested repetition to interpolation markers, allowing crafted configuration text to trigger catastrophic backtracking. Project access and a malicious CI configuration are required; repeated pipeline-editor GraphQL requests can exhaust server resources and leave requests stuck or failing.

CVSS severity6.5
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Regular expression denial of service in the GitLab CI/CD pipeline editor allows remote authenticated users to interrupt service. The pattern in lib/gitlab/ci/config/interpolation/block.rb applies nested repetition to interpolation markers, allowing crafted configuration text to trigger catastrophic backtracking. Project access and a malicious CI configuration are required; repeated pipeline-editor GraphQL requests can exhaust server resources and leave requests stuck or failing.

The record

CVE
CVE-2024-1736
Published
Jun 12, 2024
Updated
Sep 18, 2024
Vendor
GitLab
Product
GitLab
Classifications
CWE-1333, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2024Record 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=15.8 <16.10.7
  2. Affected versionversion=16.11 <16.11.4
  3. Affected versionversion=17.0 <17.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=15.8 <16.10.7; version=16.11 <16.11.4; version=17.0 <17.0.2

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
6.5NIST NVDCVSS: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-1333Inefficient Regular Expression Complexity
T1499Endpoint Denial of Service

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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