Cyber Resilience

CVE-2026-1747

Auth Bypass in Gitlab 17.11.0 – 18.7.5

Auth Bypass
Published
25 February 2026
Modified
28 February 2026
Patch / advisory
View advisory
CVSS Score v3.1 4.3
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS Score 0.0023 14th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-1747 is a medium-severity Authentication Bypass Using an Alternate Path or Channel (CWE-288) vulnerability in Gitlab Gitlab. Its CVSS base score is 4.3 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 14th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-3 (Access Enforcement) and AC-6 (Least Privilege) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A07:2025 Authentication Failures

EU & UK References

Vulnerability Data

GitLab has remediated an issue in GitLab EE affecting all versions from 17.11 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that, under certain conditions, could have allowed Developer-role users with insufficient privileges to make unauthorized modifications to protected…

more

Conan packages.

CWE(s)
CWE-288NVD-CWE-noinfo

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1195.002 Compromise Software Supply Chain Initial Access
Adversaries may manipulate application software prior to receipt by a final consumer for the purpose of data or system compromise.
attack.mitre.org →
Why these techniques?

Authorization bypass enables privilege escalation (T1068) for low-privileged users and facilitates supply-chain tampering via unauthorized package modifications (T1195.002).

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-4524Same product: Gitlab Gitlab
CVE-2025-0549Same product: Gitlab Gitlab
CVE-2026-2745Same product: Gitlab Gitlab
CVE-2025-11984Same product: Gitlab Gitlab
CVE-2026-0602Same product: Gitlab Gitlab
CVE-2024-1525Same product: Gitlab Gitlab
CVE-2026-1752Same product: Gitlab Gitlab
CVE-2025-2242Same product: Gitlab Gitlab
CVE-2026-6277Same product: Gitlab Gitlab
CVE-2026-0934Same product: Gitlab Gitlab

Affected Assets

gitlab
gitlab
18.9.0 · 17.11.0 — 18.7.5 · 17.11.0 — 18.7.5 · 18.8.0 — 18.8.5

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • AC-3 Access Enforcement
  • AC-6 Least Privilege
  • CM-5 Access Restrictions for Change
Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 7 hardening rules · 3 OS baselines
Validate
Prove the fix (OWASP ASVS)
  • V6.4.3
  • V6.6.1
  • V12.1.3

Mitigating Controls (NIST 800-53 r5) AI

AC-3 Access Enforcement good match
prevent

Directly enforces authorization checks so Developer-role accounts cannot modify protected Conan packages.

AC-6 Least Privilege good match
prevent

Ensures the Developer role is granted only the minimum privileges required, blocking unauthorized package modifications.

CM-5 Access Restrictions for Change partial match
prevent

Restricts which roles may perform configuration or content changes on protected package repositories.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-03 full match
prevents

Requiring authentication on every channel and path directly eliminates alternate-path bypasses.

PR.AA-05 mostly match
prevents

Enforcing authorizations and least privilege across all access vectors prevents unauthenticated alternate paths.

PR.IR-01 mostly match
prevents

Protecting networks and environments from unauthorized logical access blocks bypass via undocumented channels.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
detects

Security testing can detect alternate-path bypasses but does not prevent them in production.

A.8.5 Secure authentication mostly match
degrades

Secure authentication control directly mitigates bypass by requiring strong, consistent authentication on all paths.

A.5.15 Access control partial match
prevents

Access control policy directly addresses alternate authentication paths by requiring all channels to enforce authentication.

A.5.17 Authentication information partial match
degrades

Authentication information management ensures credentials and mechanisms are consistently applied across all access paths.

A.5.18 Access rights partial match
prevents

Access rights provisioning and review prevent bypass via unmonitored or alternate channels.

A.8.2 Privileged access rights partial match
prevents

Privileged access rights control reduces risk of bypass through elevated or alternate paths.

References