major vulnerability· requires attention

Authenticated remote code execution in widely used self-hosted GitLab CE/EE via CI config; affects many orgs' source/control infrastructure and requires org-wide action.

Applications

CVE-2026-93577

9.9

Critical

EPSS 0.63%Patch available

Authenticated RCE in GitLab CI via regex integer overflow

exploited

No known exploitation not in CISA KEV as of our last sync

fix

Patch available see the advisory in the references

likelihood

EPSS 0.63%top 50% of scored CVEs

Published 23 Sept 2026Analysed here 24 Sept 2026CVSS scored by the publisher (CNA)

common questions

Is CVE-2026-93577 being exploited?

Not confirmed. CVE-2026-93577 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.63% probability of exploitation in the next 30 days.

How severe is CVE-2026-93577?

CVE-2026-93577 is rated Critical with a CVSS score of 9.9. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2026-93577?

Yes. A fix has been recorded for CVE-2026-93577. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.

What does CVE-2026-93577 affect?

CVE-2026-93577 affects GitLab CE/EE 19.2 before 19.2.7, GitLab CE/EE 19.3 before 19.3.3, GitLab CE/EE 19.4 before 19.4.1, Self-hosted GitLab servers using CI/CD. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

What should I do about CVE-2026-93577?

Upgrade GitLab to fixed versions immediately; review CI configs and tokens

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

executive summary

technical analysis

affected

GitLab CE/EE 19.2 before 19.2.7GitLab CE/EE 19.3 before 19.3.3GitLab CE/EE 19.4 before 19.4.1Self-hosted GitLab servers using CI/CD

impact

Authenticated user can trigger integer overflow compiling a crafted regex in CI, leading to arbitrary code execution on the GitLab server.

action required

Immediate action required

affected versions

GitLab

affected>= 19.2 and < 19.2.7
affected>= 19.3 and < 19.3.3
affected>= 19.4 and < 19.4.1

As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.

cisa ssvc

exploitation: none
automatable: no
technical impact: total

Assessed by CISA 24 Sept 2026 (SSVC 2.0.3).

timeline

23 Sept 2026Published
24 Sept 2026CISA SSVC assessment: exploitation none · same day later
24 Sept 2026Analysed by vulneraibility.com · same day later
30 Oct 2026CVE record last updated · 37 days later

how to fix

Remediation steps are tailored for users whose stack is affected. Add this technology to your stack to see the fix checklist.

references

NVD CVE.org CVE Details Source

4 references in the CVE record: 1 exploit, 3 links

Exploithackerone.com /reports/3995696
Linkgitlab.com /gitlab-org/gitlab/-/work_items/629758
Linkdocs.gitlab.com /releases/patches/patch-release-gitlab-19-4-1-released/
Linkruby-lang.org /en/news/2026/10/23/regexp-fixes-for-gitlab-cves/

sources

CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
NVD: CVSS and CPE data
CISA Vulnrichment (ADP): SSVC decision points
FIRST EPSS: exploit probability and percentile
Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.

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