CVE-2026-15831

Q: How do I fix CVE-2026-15831?

Upgrade gitlab to 19.1.3 or later.

Q: Is CVE-2026-15831 being actively exploited?

Not that we know of. CVE-2026-15831 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.22% is the estimated probability that it will be exploited in the next 30 days. That is higher than 13% of all scored CVEs.

Q: How severe is CVE-2026-15831?

CVE-2026-15831 has a CVSS v3 base score of 4.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-15831 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.

MEDIUM

4.3

CVSS v3

NVD

Description

GitLab has remediated an issue in GitLab EE affecting all versions from 19.1 before 19.1.3 and 19.2 before 19.2.1 that under certain conditions could have allowed an authenticated user to bypass administrator-configured tool governance policies due to improper authorization enforcement during token generation.

CWE-1270

How to fix

Remediation Available

gitlabNVD

Affected:>= 19.1.0, < 19.1.3Fixed in:19.1.3CVE-2026-15831derived 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 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Exploit Intelligence

0.22%probability of exploitation in 30 days

13thpercentile

Low risk: more likely to be exploited than 13% of all known CVEs.

References

Vendor Advisory1

docs.gitlab.com

Other references1

gitlab.com

Related Vulnerabilities

Other CWE-1270 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-2882	Critical	9.8	0.6%	-	Fix
CVE-2022-31122	Critical	9.8	0.6%	-	Fix
CVE-2023-32188	Unscored	-	0.5%	-	-
CVE-2023-22644	Medium	5.5	0.5%	-	Fix
CVE-2023-30524	Medium	4.3	0.4%	-	-
CVE-2026-54593	High	8.1	0.4%	-	-

Common questions

How do I fix CVE-2026-15831?

Upgrade gitlab to 19.1.3 or later.

Is CVE-2026-15831 being actively exploited?

Not that we know of. CVE-2026-15831 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.22% is the estimated probability that it will be exploited in the next 30 days. That is higher than 13% of all scored CVEs.

How severe is CVE-2026-15831?

CVE-2026-15831 has a CVSS v3 base score of 4.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-15831 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-2026-15831

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 2026-08-03.