CVE-2023-6682Network attack vector

Server resource exhaustion via Discord attachment regex

Published May 9, 2024 · Updated Oct 3, 2024

Regular expression denial of service in GitLab CE/EE 16.9 through 16.11 allows remote authenticated users to exhaust server resources. Integrations::Discord::ATTACHMENT_REGEX applies nested, unbounded matching to attacker-controlled attachment text, causing excessive backtracking on repeated delimiters. The path requires an enabled Discord integration and low-privileged authenticated access; exploitation interrupts service without reported data access or modification.

CVSS severity6.5
Medium
EPSS probability0.75%
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 GitLab CE/EE 16.9 through 16.11 allows remote authenticated users to exhaust server resources. Integrations::Discord::ATTACHMENT_REGEX applies nested, unbounded matching to attacker-controlled attachment text, causing excessive backtracking on repeated delimiters. The path requires an enabled Discord integration and low-privileged authenticated access; exploitation interrupts service without reported data access or modification.

The record

CVE
CVE-2023-6682
Published
May 9, 2024
Updated
Oct 3, 2024
Vendor
GitLab
Product
GitLab
Classifications
CWE-1333, T1499.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 9, 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

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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=16.10 <16.10.5
  2. Affected versionversion=16.11 <16.11.2
  3. Affected versionversion=16.9 <16.9.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=16.10 <16.10.5; version=16.11 <16.11.2; version=16.9 <16.9.7

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
6.5NISTCVSS: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 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
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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