CVE-2025-12562Network attack vector

Unauthenticated service interruption via GraphQL complexity bypass

Published Dec 11, 2025 · Updated Dec 11, 2025

Denial of service in affected GitLab CE/EE releases allows remote attackers to interrupt service through crafted GraphQL queries. Across versions 11.10 through 18.4.5, 18.5 through 18.5.3, and 18.6 through 18.6.1, the queries evade endpoint complexity limits; the faulty resolver calculation is undisclosed. Unauthenticated network access to a GraphQL endpoint is sufficient, and resource-intensive queries can exhaust server capacity and make the instance unresponsive.

CVSS severity7.5
High
EPSS probability0.86%
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 affected GitLab CE/EE releases allows remote attackers to interrupt service through crafted GraphQL queries. Across versions 11.10 through 18.4.5, 18.5 through 18.5.3, and 18.6 through 18.6.1, the queries evade endpoint complexity limits; the faulty resolver calculation is undisclosed. Unauthenticated network access to a GraphQL endpoint is sufficient, and resource-intensive queries can exhaust server capacity and make the instance unresponsive.

The record

CVE
CVE-2025-12562
Published
Dec 11, 2025
Updated
Dec 11, 2025
Vendor
GitLab
Product
GitLab
Classifications
CWE-770, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 11, 2025Record 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=11.10 <18.4.6
  2. Affected versionversion=18.5 <18.5.4
  3. Affected versionversion=18.6 <18.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GitLab · GitLabversion=11.10 <18.4.6; version=18.5 <18.5.4; version=18.6 <18.6.2

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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
T1499.004Application or System Exploitation

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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