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Security Digest · Vulnerability record · Known exploited

CVE-2026-97229: GitLab Community Edition and Enterprise Edition Integer Overflow or Wraparound Vulnerability

Exploited in the wild (CISA KEV). GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.2 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain conditions, could have allowed an unauthenticated user to execute arbitrary code on the GitLab server via a specially crafted…

CISA KEV · added 2026-10-29 CVSS 10.0 Critical EPSS 65.2% · p99 Act now

Updated By erroneo.us Security Desk11 references Seen in the digest for Oct 29, 2026

Should you act?

Exploited: patch now if you run it

CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

  • Yes, if you run GitLab Community Edition and Enterprise Edition. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-10-29, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-11-01; treat that as the outer limit, not the target.
  • EPSS 65.2%, percentile 99: FIRST’s model estimates a 65.2% chance of exploitation activity in the next 30 days, higher than 99% of all scored CVEs (very high). EPSS is a probability, not a verdict.
  • Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
  • Editorial verdict: Act now. GitLab CVE-2026-97229: CVSS 10 CI Regex RCE Now Exploited — If you run self-managed GitLab 19.2 or later, confirm today that you are on a fixed official package, or on patched Ruby if you build GitLab yourself; attackers are already trying this against public instances.

What it is

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.2 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain conditions, could have allowed an unauthenticated user to execute arbitrary code on the GitLab server via a specially crafted regular expression in a CI/CD configuration, due to insufficient regular expression validation.

CISA’s summary

GitLab Community Edition and Enterprise Edition contain a integer overflow or wraparound vulnerability that could allow an unauthenticated user to execute arbitrary code on the GitLab server via a specially crafted regular expression in a CI/CD configuration, due to insufficient regular expression validation.

Weakness type: CWE-190.

Product: GitLab Community Edition and Enterprise Edition · Assigned by: GitLab · Published: 2026-10-13

Affected and fixed versions

VendorProductAffected versions (per CVE record)
GitLabGitLab19.2 < 19.2.8, 19.3 < 19.3.5, 19.4 < 19.4.2

Severity scores

Scored byCVSSScoreVector
GitLab3.110 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
  • Attack vector: network (remotely reachable)
  • Attack complexity: low
  • Privileges required: none (no login)
  • User interaction: none
  • Scope: changed (can affect other components)

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

  • CISA KEV: added 2026-10-29; federal due date 2026-11-01. Known ransomware use: Unknown.
  • CISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
  • CISA SSVC assessment: exploitation active, automatable yes, technical impact total.
  • FIRST EPSS (model of 2026-11-04): 65.22% probability of exploitation activity in the next 30 days; percentile 99.

Timeline

  • — CVE record published by GitLab
  • — Added to CISA’s Known Exploited Vulnerabilities catalog
  • — erroneo.us brief: GitLab CVE-2026-97229: CVSS 10 CI Regex RCE Now Exploited
  • — CVE record last updated
  • — CISA remediation deadline for US federal agencies

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Vendor and project advisories, patches

  1. Listed in CISA KEV notes (ruby-lang.org) ruby-lang.org
  2. Listed in CISA KEV notes (docs.gitlab.com) docs.gitlab.com

Vulnerability records

  1. CVE.org record CVE-2026-97229 cve.org
  2. NVD entry CVE-2026-97229 nvd.nist.gov

Government

  1. CISA Known Exploited Vulnerabilities catalog entry cisa.gov
  2. Listed in CISA KEV notes (cisa.gov) cisa.gov
  3. Listed in CISA KEV notes (cisa.gov) cisa.gov

Other references from the CVE record and advisory

  1. gitlab.com gitlab.com
  2. HackerOne Bug Bounty Report #4055749 hackerone.com
  3. HackerOne Bug Bounty Report #4058589 hackerone.com
  4. github.com github.com

All exploited GitLab vulnerabilities · Today’s Security Digest