CVE-2026-15975Network attack vector

Unauthenticated service interruption via insufficient discussion throttling

Published Jul 29, 2026 · Updated Jul 29, 2026

Resource exhaustion in affected GitLab CE/EE releases allows remote attackers to interrupt service via merge request discussions. The merge request discussion processor handles unauthenticated requests without sufficient resource throttling, enabling request-driven resource exhaustion. Exploitation requires unspecified conditions on a network-reachable discussion path; public records do not distinguish whether interruption is a hang or crash.

CVSS severity7.5
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in affected GitLab CE/EE releases allows remote attackers to interrupt service via merge request discussions. The merge request discussion processor handles unauthenticated requests without sufficient resource throttling, enabling request-driven resource exhaustion. Exploitation requires unspecified conditions on a network-reachable discussion path; public records do not distinguish whether interruption is a hang or crash.

The record

CVE
CVE-2026-15975
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-770, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 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=11.8 <19.0.5
  2. Affected versionversion=19.1 <19.1.3
  3. Affected versionversion=19.2 <19.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GitLab · GitLabversion=11.8 <19.0.5; version=19.1 <19.1.3; version=19.2 <19.2.1

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
T1499.003Application Exhaustion Flood

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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