CVE-2023-6502Network attack vector

Service interruption via crafted wiki rendering

Published May 23, 2024 · Updated Oct 3, 2024

ReDoS in GitLab before 16.10.6, 16.11 before 16.11.3, and 17.0 before 17.0.1 allows remote authenticated users to interrupt service. An inefficient regular expression in the wiki render path performs excessive backtracking on crafted page content, consuming application CPU. Low-privileged access is required to submit the page; the resulting resource exhaustion degrades GitLab web availability.

CVSS severity4.3
Medium
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

ReDoS in GitLab before 16.10.6, 16.11 before 16.11.3, and 17.0 before 17.0.1 allows remote authenticated users to interrupt service. An inefficient regular expression in the wiki render path performs excessive backtracking on crafted page content, consuming application CPU. Low-privileged access is required to submit the page; the resulting resource exhaustion degrades GitLab web availability.

The record

CVE
CVE-2023-6502
Published
May 23, 2024
Updated
Oct 3, 2024
Vendor
GitLab
Product
GitLab
Classifications
CWE-1333, CAPEC-492, T1499.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 23, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 3, 2024Record 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=0 <16.10.6
  2. Affected versionversion=16.11 <16.11.3
  3. Affected versionversion=17.0 <17.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=0 <16.10.6; version=16.11 <16.11.3; version=17.0 <17.0.1

Published CVSS scores

4.3GitLabCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
CAPEC-492Regular Expression Exponential Blowup
T1499.003Application Exhaustion Flood

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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