CVE-2026-2745 [Medium] | Authentication Bypass in Gitlab

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 7.11 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an unauthenticated user to bypass WebAuthn two-factor authentication and gain unauthorized access to user accounts due to inconsistent input validation in the authentication process.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-03-27	0.05%	0.05%	+0.01%
2	2026-03-26	—	0.05%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-03-27

0.05%

+0.01%

2026-03-26

—

0.05%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
6.8	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/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:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. 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:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.	1.6	5.2	[email protected]
8.1	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.	2.8	5.2	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

6.8

3.1

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/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:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N): Service keeps running; no real outage angle.

1.6

5.2

[email protected]

8.1

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N): Service keeps running; no real outage angle.

2.8

5.2

[email protected]

OS Trackers for CVE-2026-2745

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2026-2745 not yet assigned priority: Debian including 1 source packages (gitlab), 1 status rows across 1 suites (sid): open 1.	https://security-tracker.debian.org/tracker/CVE-2026-2745
`ubuntu`	medium	CVE-2026-2745 medium priority: Ubuntu including 1 source packages (gitlab), 5 status rows across 5 suites (jammy, noble, questing, upstream, xenial): DNE 3, ignored 1, needs-triage 1.	https://ubuntu.com/security/CVE-2026-2745

Affected software / configurations for CVE-2026-2745

Vendor	Product	Version	Raw CPE
gitlab	gitlab	>= 7.11.0, < 18.8.7	cpe:2.3:a:gitlab:gitlab:::::community:::*
gitlab	gitlab	>= 7.11.0, < 18.8.7	cpe:2.3:a:gitlab:gitlab:::::enterprise:::*
gitlab	gitlab	>= 18.9.0, < 18.9.3	cpe:2.3:a:gitlab:gitlab:::::community:::*
gitlab	gitlab	>= 18.9.0, < 18.9.3	cpe:2.3:a:gitlab:gitlab:::::enterprise:::*
gitlab	gitlab	18.10.0	cpe:2.3:a:gitlab:gitlab:18.10.0::::community:::
gitlab	gitlab	18.10.0	cpe:2.3:a:gitlab:gitlab:18.10.0::::enterprise:::

References for CVE-2026-2745

URL	Tags
https://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released/	Release Notes Vendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/work_items/590810	Broken Link
https://hackerone.com/reports/3557844	Permissions Required

URL

CVE-2026-2745 | Authentication Bypass Using an Alternate Path or Channel in GitLab

Exploit prediction scoring system (EPSS) score for CVE-2026-2745

Common vulnerability scoring system (CVSS) metrics for CVE-2026-2745

Weakness enumeration for CVE-2026-2745

OS Trackers for CVE-2026-2745

Affected software / configurations for CVE-2026-2745

References for CVE-2026-2745