CVE-2024-2800Network attack vector

Service hang via wildcard regex backtracking

Published Aug 8, 2024 · Updated Aug 30, 2024

Regular expression denial of service in RefMatcher in GitLab EE/CE allows remote authenticated users to hang server-side request processing. RefMatcher applies wildcard branch-name patterns through a backtracking regular expression without an effective complexity bound for crafted names. Affected releases are 11.3 through 17.0.5, 17.1 through 17.1.3, and 17.2 through 17.2.1; low-privileged network access is required.

CVSS severity6.5
Medium
EPSS probability0.68%
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 RefMatcher in GitLab EE/CE allows remote authenticated users to hang server-side request processing. RefMatcher applies wildcard branch-name patterns through a backtracking regular expression without an effective complexity bound for crafted names. Affected releases are 11.3 through 17.0.5, 17.1 through 17.1.3, and 17.2 through 17.2.1; low-privileged network access is required.

The record

CVE
CVE-2024-2800
Published
Aug 8, 2024
Updated
Aug 30, 2024
Vendor
GitLab
Product
GitLab
Classifications
CWE-1333, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 30, 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=11.3 <17.0.6
  2. Affected versionversion=17.1 <17.1.4
  3. Affected versionversion=17.2 <17.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=11.3 <17.0.6; version=17.1 <17.1.4; version=17.2 <17.2.2

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
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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-1333Inefficient Regular Expression Complexity
T1499.004Application or System Exploitation

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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