CVE-2026-16553Network attack vector

Authenticated credential disclosure via misrouted upstream requests

Published Jul 29, 2026 · Updated Jul 29, 2026

Credential exposure in affected GitLab EE virtual registries allows remote authenticated users to disclose secrets to an unintended host. Virtual registry request handling forwards sensitive upstream-request information to a host that should not receive it. Exploitation requires an authenticated account, an affected Enterprise Edition instance, and conditions involving configured virtual registries; the exact trigger is undisclosed.

CVSS severity5.4
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Credential exposure in affected GitLab EE virtual registries allows remote authenticated users to disclose secrets to an unintended host. Virtual registry request handling forwards sensitive upstream-request information to a host that should not receive it. Exploitation requires an authenticated account, an affected Enterprise Edition instance, and conditions involving configured virtual registries; the exact trigger is undisclosed.

The record

CVE
CVE-2026-16553
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-522, T1190
Attack vector
network
Privileges
authenticated

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=18.8 <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 privilegesauthenticated

What is affected?

GitLab · GitLabversion=18.8 <19.0.5; version=19.1 <19.1.3; version=19.2 <19.2.1

Published CVSS scores

5.4GitLabCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-522Insufficiently Protected Credentials
T1190Exploit Public-Facing Application

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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