GitLab up to 19.3.5/19.4.2/19.5.0 OAuth/OIDC Discovery redirect

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.8$0-$5k1.55

Summaryinfo

A vulnerability, which was classified as problematic, has been found in GitLab up to 19.3.5/19.4.2/19.5.0. This issue affects some unknown processing of the component OAuth/OIDC Discovery. Performing a manipulation results in redirect. This vulnerability is known as CVE-2026-112212. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in GitLab up to 19.3.5/19.4.2/19.5.0. This affects an unknown functionality of the component OAuth/OIDC Discovery. The manipulation with an unknown input leads to a redirect vulnerability. CWE is classifying the issue as CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. This is going to have an impact on integrity. The summary by CVE is:

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, an unauthenticated user could have poisoned a shared cache's OAuth/OIDC discovery document to redirect certain flows to an externally controlled server, due to improper trust of user-supplied values when constructing endpoint URLs in cached discovery responses.

It is possible to read the advisory at gitlab.com. This vulnerability is uniquely identified as CVE-2026-112212 since 10/19/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1204.001 according to MITRE ATT&CK.

Upgrading to version 19.3.6, 19.4.3 or 19.5.1 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (GitLab): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Redirect
CWE: CWE-601
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: GitLab 19.3.6/19.4.3/19.5.1

Timelineinfo

10/19/2026 CVE reserved
10/21/2026 +2 days VulDB entry created
10/22/2026 +0 days Advisory disclosed
10/22/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: gitlab.com
Status: Confirmed

CVE: CVE-2026-112212 (🔒)
GCVE (CVE): GCVE-0-2026-112212
GCVE (VulDB): GCVE-100-425055

Entryinfo

Created: 10/22/2026 01:58
Changes: 10/22/2026 01:58 (63)
Complete: 🔍
Cache ID: 216::103

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