CVE-2026-1747Public exploitNetwork attack vector

Developer package tampering via existing Conan upload

Published Feb 25, 2026 · Updated Feb 25, 2026

Access control bypass in GitLab EE 17.11 through 18.7.4, 18.8 through 18.8.4, and 18.9.0 allows remote authenticated users to alter protected Conan packages. The Conan v1 upload path enforces package protection for new packages but skips it for files added to an existing package, including attacker-controlled conanfile.py. Developer access and an existing protected package are required; attacker-controlled Python runs only when a downstream user installs the compromised package.

CVSS severity4.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Access control bypass in GitLab EE 17.11 through 18.7.4, 18.8 through 18.8.4, and 18.9.0 allows remote authenticated users to alter protected Conan packages. The Conan v1 upload path enforces package protection for new packages but skips it for files added to an existing package, including attacker-controlled conanfile.py. Developer access and an existing protected package are required; attacker-controlled Python runs only when a downstream user installs the compromised package.

The record

CVE
CVE-2026-1747
Published
Feb 25, 2026
Updated
Feb 25, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-288, T1195.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 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=17.11 <18.7.5
  2. Affected versionversion=18.8 <18.8.5
  3. Affected versionversion=18.9 <18.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=17.11 <18.7.5; version=18.8 <18.8.5; version=18.9 <18.9.1

Published CVSS scores

4.3GitLabCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

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 exploitPublished

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
T1195.002Compromise Software Supply Chain

Public exploit references

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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