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CVE-2026-1403 is a denial-of-service vulnerability in GitLab Community Edition and Enterprise Edition caused by improper validation of CSV file structure during CSV import processing. A malformed CSV file submitted by an authenticated user can trigger failures in background job handling and disrupt Sidekiq workers responsible for processing the import. The issue affects GitLab CE/EE versions from 11.7 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3.
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No public exploit code observed for this vulnerability.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A GitLab CSV import vulnerability that allows authenticated users to disrupt Sidekiq workers, causing denial of service.
A medium-severity GitLab vulnerability where weak CSV validation can let an authenticated user crash Sidekiq background workers during file import.
A denial-of-service vulnerability in GitLab CE/EE CSV import handling that could let an authenticated user disrupt Sidekiq workers through malformed CSV structure.
A denial-of-service vulnerability in GitLab CSV import that could let an authenticated user disrupt Sidekiq workers via malformed CSV structure.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.