CVE-2026-0595Network attack vector

Unauthorized email addition via test case title injection

Published Feb 11, 2026 · Updated Feb 11, 2026

HTML injection in affected GitLab CE/EE releases allows remote authenticated users to add unauthorized email addresses to user accounts. Test case titles accept attacker-controlled HTML that is rendered to another user, but GitLab has not disclosed the exact rendering function or sanitization failure. The attacker needs authenticated access and a victim must view the injected title; the resulting account change is limited to adding email addresses, with no reported availability impact.

CVSS severity7.3
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTML injection in affected GitLab CE/EE releases allows remote authenticated users to add unauthorized email addresses to user accounts. Test case titles accept attacker-controlled HTML that is rendered to another user, but GitLab has not disclosed the exact rendering function or sanitization failure. The attacker needs authenticated access and a victim must view the injected title; the resulting account change is limited to adding email addresses, with no reported availability impact.

The record

CVE
CVE-2026-0595
Published
Feb 11, 2026
Updated
Feb 11, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 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=13.9 <18.6.6
  2. Affected versionversion=18.7 <18.7.4
  3. Affected versionversion=18.8 <18.8.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=13.9 <18.6.6; version=18.7 <18.7.4; version=18.8 <18.8.4

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
7.3GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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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