CVE-2026-9807 | Incorrect Authorization in GitLab

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.

Published: 2026-05-28 Last update: 2026-05-29 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-9807 is rated Low Risk (17.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.01%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-9807

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-28 — 0.01% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-9807

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 1.4 [email protected]

Weakness enumeration for CVE-2026-9807

GitHub Security Advisory for CVE-2026-9807

GHSA-77hj-c554-4343 · Severity: medium — GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.9 before 18.10.7,...

OS Trackers for CVE-2026-9807

vendor priority summary link
ubuntu medium CVE-2026-9807 medium priority: Ubuntu including 1 source packages (gitlab), 5 status rows across 5 suites (jammy, noble, questing, resolute, upstream): DNE 4, needs-triage 1. https://ubuntu.com/security/CVE-2026-9807

Affected software / configurations for CVE-2026-9807

Vendor Product Version Raw CPE
gitlab gitlab >= 18.9.0, < 18.10.7 cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
gitlab gitlab >= 18.9.0, < 18.10.7 cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
gitlab gitlab >= 18.11.0, < 18.11.4 cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
gitlab gitlab >= 18.11.0, < 18.11.4 cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
gitlab gitlab 19.0.0 cpe:2.3:a:gitlab:gitlab:19.0.0:*:*:*:community:*:*:*
gitlab gitlab 19.0.0 cpe:2.3:a:gitlab:gitlab:19.0.0:*:*:*:enterprise:*:*:*

References for CVE-2026-9807

cvelogic Threat Intelligence