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CVE-2023-6489

Inefficient Regular Expression Complexity in GitLab

Description

A denial of service vulnerability was identified in GitLab CE/EE, versions 16.7.7 prior to 16.8.6, 16.9 prior to 16.9.4 and 16.10 prior to 16.10.2 which allows an attacker to spike the GitLab instance resources usage resulting in service degradation via chat integration feature.

Public exploit

An exploit or proof of concept is public: anyone can try it against an unpatched system. A reference of the record is tagged as an exploit.

Show the exploits1

References tagged exploit1 reference

Timeline

  1. ID reserved

    By GitLab

  2. · 4 months later

    Published

  3. · 2 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2023-6489, by who scored it
Scored byCVSSScoreVector
GitLabCNA (assigner)3.1Medium4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
NVDNVD · Analyzed3.1Medium6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.61% · top 51% of all CVEs (11 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.

Affected products

  • GitLab · GitLab

    • affected 16.7.7 – < 16.8.6
    • affected 16.9 – < 16.9.4
    • affected 16.10 – < 16.10.2

What to do

Solution: Upgrade to versions 16.8.6, 16.9.4, 16.10.2 or above.

References

References2

Sources

The same CVE in the primary databases and aggregators, to check against.

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[![CVE-2023-6489](https://cveledger.app/badge/CVE-2023-6489.svg)](https://cveledger.app/cve/CVE-2023-6489)

Record last updated .