Security readout for executives and security teams
Plain-English summary
This flaw lets a low-privileged attacker make GitLab pipelines fail, disrupting CI/CD rather than stealing data. The main business impact is delayed builds, releases, tests, and automation in affected GitLab CE or EE versions.
Executive priority
Treat as a near-term reliability fix, not an emergency breach response. Patch systems where CI/CD disruption could delay releases or operational changes.
Technical view
CVE-2023-3917 is a CWE-1287 improper input validation issue in GitLab pipelines. The CVSS vector indicates network access, low privileges, no user interaction, unchanged scope, no confidentiality or integrity impact, and low availability impact.
Likely exposure
Exposure applies to GitLab CE and EE before 16.2.8, 16.3 before 16.3.5, and 16.4 before 16.4.1, especially where CI/CD pipelines are business-critical.
Exploitation context
The source bundle does not provide evidence of active exploitation, and CISA KEV is false. Referenced GitLab and HackerOne details are permission-required, limiting public technical confirmation.
Researcher notes
Publicly supplied details are sparse because the GitLab issue and HackerOne report are permission-required. Analysis relies mainly on CVE metadata, CVSS, affected-version ranges, and the stated pipeline denial-of-service impact.
Mitigation direction
- Upgrade GitLab CE or EE to 16.2.8, 16.3.5, 16.4.1, or later.
- Prioritize instances where failed pipelines block releases, tests, or production deployment workflows.
- Review GitLab vendor advisories for any additional operational guidance.
- Monitor pipeline failure rates for unusual spikes until patched.
Validation and detection
- Inventory GitLab CE and EE versions across self-managed environments.
- Confirm affected instances are at or above the fixed version for their release track.
- Review recent CI/CD pipeline failures for unexplained repeated patterns.
- Verify upgrade completion with package, container, or application version checks.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-1287: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-3917 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- GitLab Issue #417896CVE reference · issue-tracking, permissions-required
- HackerOne Bug Bounty Report #2055158CVE reference · technical-description, exploit
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Validation of Specified Type of Input
Improper Validation of Specified Type of Input represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.