CVE-2019-13010Public exploitNetwork attack vector

Service interruption via catastrophic color-validation backtracking

Published Mar 10, 2020 · Updated Aug 4, 2024

Regular expression denial of service in GitLab Enterprise Edition 8.3 through 12.0.2 allows remote attackers to interrupt service. The regular expression in app/validators/color_validator.rb backtracks excessively while validating a long, specially formatted color value. Exploitation requires a crafted color string; repeated requests can consume most server CPU and keep the entire GitLab service unavailable.

CVSS severity5.9
Medium
EPSS probability0.94%
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 Enterprise Edition 8.3 through 12.0.2 allows remote attackers to interrupt service. The regular expression in app/validators/color_validator.rb backtracks excessively while validating a long, specially formatted color value. Exploitation requires a crafted color string; repeated requests can consume most server CPU and keep the entire GitLab service unavailable.

The record

CVE
CVE-2019-13010
Published
Mar 10, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.9UbuntuCVSS:3.1/AV:N/AC:H/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.

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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
Privilegesunauthenticated
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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