CVE-2019-13004Public exploitNetwork attack vector

Comment denial of service via oversized link path

Published Mar 10, 2020 · Updated Aug 4, 2024

Denial of service in GitLab Community and Enterprise Edition 11.10 through 12.0.2 allows remote authenticated users to block issue comments. The issue-comment notes endpoint accepts a Markdown link with an extremely long repeated path, and subsequent comment fetching fails while repeated requests exhaust server CPU. Any account able to comment on an issue can trigger the client-side outage, while sustained requests can degrade availability for all users.

CVSS severity5.3
Medium
EPSS probability1.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in GitLab Community and Enterprise Edition 11.10 through 12.0.2 allows remote authenticated users to block issue comments. The issue-comment notes endpoint accepts a Markdown link with an extremely long repeated path, and subsequent comment fetching fails while repeated requests exhaust server CPU. Any account able to comment on an issue can trigger the client-side outage, while sustained requests can degrade availability for all users.

The record

CVE
CVE-2019-13004
Published
Mar 10, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 10, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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 exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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