TI-2026-69278 Aliases CVE-2026-1403 GHSA-6w5v-7h2v-438h

Resource allocation without limits in GitLab CSV import causes denial of service

LOW 29CWE-770Published 2026-10-07 · Updated 2026-10-07

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

GitLab CE/EE from 11.7 before 18.8.9, from 18.9 before 18.9.5, and from 18.10 before 18.10.3 is affected. Improper validation of CSV file structure during CSV import lets an authenticated user cause a denial of service of Sidekiq workers (CWE-770). An authenticated user with low privileges can trigger the flaw over the network, and it affects availability only. Exploit link is listed in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.7 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that when importing CSV files could have allowed an authenticated user to cause denial of service to Sidekiq workers due to improper validation of CSV file structure.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00327 25th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix Fixed GitLab (GitLab): 18.8.9, 18.9.5, 18.10.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
GitLab	GitLab	11.7 to before 18.8.9; 18.9 to before 18.9.5; 18.10 to before 18.10.3	18.8.9, 18.9.5, 18.10.3	Patch available	CNA

GitLab VendorGitLab Affected 11.7 to before 18.8.9; 18.9 to before 18.9.5; 18.10 to before 18.10.3 Fixed in 18.8.9, 18.9.5, 18.10.3 Patch available CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:gitlab:gitlab::::::::	—	—	GitLab

cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:* Versions — — ·GitLab

Remediation

GitLab fixes this in 18.8.9, 18.9.5, and 18.10.3. CISA's SSVC data does not list exploitation.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Fix · CNA GitLab (GitLab) Fixed in 18.8.9, 18.9.5, 18.10.3

Timeline

2026-10-07 Threatist record created from CVE-2026-1403
2026-10-07 Alias added: GHSA-6w5v-7h2v-438h

References

Exploit 1

HackerOne Bug Bounty Report #3328937

Other 1

https://gitlab.com/gitlab-org/gitlab/-/work_items/587573

TI-2026-71508 Integer overflow in GitLab allows code execution on the server KEVCVSS 3.1CRITICAL 10.0
TI-2026-58817 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in GitLab KEVCVSS 3.1CRITICAL 10.0
TI-2023-06425 Weak Password Recovery Mechanism for Forgotten Password in GitLab KEVCVSS 3.1CRITICAL 10.0
TI-2021-05191 Code injection in GitLab KEVCVSS 3.1CRITICAL 10.0
TI-2021-05161 Server-side request forgery in GitLab KEVCVSS 3.1CRITICAL 9.8
TI-2022-02763 Injection in GitLab CVSS 3.1CRITICAL 9.9

See all 1524 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences