CVE-2026-1659Network attack vector

Service interruption via crafted job update requests

Published May 14, 2026 · Updated May 14, 2026

Denial of service in GitLab CE/EE allows remote attackers to interrupt service through crafted CI/CD job update API requests. The API applies insufficient input validation before processing the requests, but GitLab has not disclosed the malformed field or resource operation. The endpoint is reachable without authentication, and the documented impact is availability loss only, with no reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in GitLab CE/EE allows remote attackers to interrupt service through crafted CI/CD job update API requests. The API applies insufficient input validation before processing the requests, but GitLab has not disclosed the malformed field or resource operation. The endpoint is reachable without authentication, and the documented impact is availability loss only, with no reported data disclosure or modification.

The record

CVE
CVE-2026-1659
Published
May 14, 2026
Updated
May 14, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-770, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 2026CVE publishedPublication date reported by the CVE source.
  2. May 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=18.10 <18.10.6
  2. Affected versionversion=18.11 <18.11.3
  3. Affected versionversion=9.0 <18.9.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GitLab · GitLabversion=18.10 <18.10.6; version=18.11 <18.11.3; version=9.0 <18.9.7

Published CVSS scores

7.5GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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