CVE-2026-9807

🔶 medium

Summary

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.9 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1 that under certain conditions could have allowed a blocked Project Access Token to continue accessing private resources due to incorrect authorization enforcement.

CVSS Score

4.3

Medium

EPSS Score

0.0

Exploit Probability

Published Date

2026-05-28

First Seen: 2026-05-29

📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 5.4% of all 328,009 vulnerabilities in our database.

#310,261

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: May 28, 2026

🔍 Exploitation Status

Poc

Proof-of-concept available

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Partial

Limited system impact

🏆 Discovered By

Thanks [s4dmach1ne](https://hackerone.com/s4dmach1ne) for reporting this vulnerability through our HackerOne bug bounty program

SSVC data provided by CISA

Last Modified 2026-05-29

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-863

📦 Affected Products 3

Vendor	Product	Status	Affected Versions
gitlab	gitlab	Affected	> 18.9.0 < 18.10.7
gitlab	gitlab	Affected	> 18.11.0 < 18.11.4
gitlab	gitlab	Affected	v19.0.0

🔗 References 3

https://about.gitlab.com/releases/2026/05/27/patch-r...

Release Notes

https://gitlab.com/gitlab-org/gitlab/-/work_items/59...

Broken Link

https://hackerone.com/reports/3554993

Permissions Required

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-10087	⚠️ high	8.7	0.4	GitLab has remediated an issue in GitLab EE affecting all versions from 17.1 before 18.10.8, 18.11 before 18.11.5, and 1...	2026-06-11
CVE-2026-10733	🔶 medium	4.3	0.4	GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.0 before 18.10.8, 18.11 before 18.11.5, an...	2026-06-11
CVE-2026-1500	🔶 medium	6.5	0.6	GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.10 before 18.10.8, 18.11 before 18.11.5, a...	2026-06-11
CVE-2026-3553	ℹ️ low	3.1	0.3	GitLab has remediated an issue in GitLab CE/EE affecting all versions from 12.0 before 18.10.8, 18.11 before 18.11.5, an...	2026-06-11
CVE-2026-6269	🔶 medium	5.4	0.3	GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.10 before 18.10.8, 18.11 before 18.11.5, a...	2026-06-11
CVE-2026-6277	🔶 medium	4.3	0.3	GitLab has remediated an issue in GitLab EE affecting all versions from 13.9 before 18.10.8, 18.11 before 18.11.5, and 1...	2026-06-11

These CVEs affect the same products