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CVE-2026-1659 is a denial-of-service vulnerability in GitLab Community Edition and Enterprise Edition affecting self-managed instances. The flaw is present in the CI/CD job update API and is caused by insufficient input validation and uncontrolled resource allocation when processing specially crafted requests. Affected versions include all releases from 9.0 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3. The vulnerable request-handling logic can be abused remotely by an unauthenticated attacker to trigger excessive resource consumption, resulting in service degradation or outage.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity unauthenticated denial-of-service vulnerability in the GitLab CI/CD job update API that can be exploited with crafted payloads to overwhelm the system.
A denial-of-service vulnerability in GitLab that allows unauthenticated users to trigger service disruption via specially crafted requests or JSON payloads to affected APIs.
An unauthenticated denial-of-service vulnerability in GitLab's CI/CD job update API caused by insufficient input validation and uncontrolled resource allocation, affecting self-managed GitLab CE/EE instances from version 9.0 until patched releases.
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.