CVE-2026-5816 | GitLab Community Edition/Enterprise Edition up to 18.10.3/18.11.0 resolution of path

VDB-359025 · CVE-2026-5816 · GCVE-0-2026-5816 GITLAB COMMUNITY EDITION/ENTERPRISE EDITION UP TO 18.10.3/18.11.0 RESOLUTION OF PATH HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.4 $0-$5k 1.91+ Summaryinfo A vulnerability identified as problematic has been detected in GitLab Community Edition and Enterprise Edition up to 18.10.3/18.11.0. The impacted element is an unknown function. Performing a manipulation results in resolution of path. This vulnerability is known as CVE-2026-5816. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component. Detailsinfo A vulnerability was found in GitLab Community Edition and Enterprise Edition up to 18.10.3/18.11.0. It has been classified as problematic. This affects some unknown functionality. The manipulation with an unknown input leads to a resolution of path vulnerability. CWE is classifying the issue as CWE-41. The product is vulnerable to file system contents disclosure through path equivalence. Path equivalence involves the use of special characters in file and directory names. The associated manipulations are intended to generate multiple names for the same object. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is: GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions. The weakness was published by joaxcar. The advisory is shared at hackerone.com. This vulnerability is uniquely identified as CVE-2026-5816 since 04/08/2026. The exploitability is told to be difficult. 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. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue. Upgrading to version 18.10.4 or 18.11.1 eliminates this vulnerability. Productinfo Type Bug Tracking Software Vendor GitLab Name Community Edition Enterprise Edition Version 18.0 18.1 18.2 18.3 18.4 18.5 18.6 18.7 18.8 18.9 18.10 18.10.0 18.10.1 18.10.2 18.10.3 18.11.0 License open-source Website Vendor: https://gitlab.com/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.5 VulDB Meta Temp Score: 6.4 VulDB Base Score: 5.0 VulDB Temp Score: 4.8 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 8.0 CNA Vector (GitLab): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Resolution of path CWE: CWE-41 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Community Edition/Enterprise Edition 18.10.4/18.11.1 Timelineinfo 04/08/2026 CVE reserved 04/22/2026 +14 days Advisory disclosed 04/22/2026 +0 days VulDB entry created 04/22/2026 +0 days VulDB entry last update Sourcesinfo Vendor: gitlab.com Advisory: hackerone.com Researcher: joaxcar Status: Confirmed CVE: CVE-2026-5816 (🔒) GCVE (CVE): GCVE-0-2026-5816 GCVE (VulDB): GCVE-100-359025 Entryinfo Created: 04/22/2026 19:03 Changes: 04/22/2026 19:03 (64) Complete: 🔍 Cache ID: 99:8F3:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸