CVE-2026-12635

Q: How do I fix CVE-2026-12635?

Upgrade gitlab to 19.0.3 or later.

Q: Is CVE-2026-12635 being actively exploited?

Not that we know of. CVE-2026-12635 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.16% is the estimated probability that it will be exploited in the next 30 days. That is higher than 6% of all scored CVEs.

Q: What does CVE-2026-12635 affect?

Published advisories record a fix for gitlab (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

UNSCORED

NVD

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 8.3 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user with maintainer-role permissions to make requests to internal network resources through mirror synchronization due to improper URL validation.

CWE-350

How to fix

Remediation Available

gitlabNVD

Affected:>= 19.0.0, < 19.0.3Fixed in:19.0.3CVE-2026-12635derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3.1 Vector

No CVSS vector data available.

Exploit Intelligence

0.16%probability of exploitation in 30 days

6thpercentile

Low risk: more likely to be exploited than 6% of all known CVEs.

References

Vendor Advisory1

docs.gitlab.com

Other references1

gitlab.com

Related Vulnerabilities

Other CWE-350 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-22884	High	7.5	32%	-	Fix
CVE-2018-7160	High	8.8	9.9%	-	Fix
CVE-2017-0902	High	8.1	4.8%	-	Fix
CVE-2026-1490	Critical	9.8	1.2%	-	-
CVE-2021-34561	High	7.5	0.9%	-	-
CVE-2020-11091	Medium	5.8	0.9%	-	Fix

Common questions

How do I fix CVE-2026-12635?

Upgrade gitlab to 19.0.3 or later.

Is CVE-2026-12635 being actively exploited?

Not that we know of. CVE-2026-12635 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.16% is the estimated probability that it will be exploited in the next 30 days. That is higher than 6% of all scored CVEs.

What does CVE-2026-12635 affect?

Published advisories record a fix for gitlab (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-12635

Markdown

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-26.