CVE-2026-8589Network attack vector

Unauthorized account email addition via unsanitized group settings

Published Jun 11, 2026 · Updated Jun 11, 2026

HTML injection in affected GitLab EE versions allows remote authenticated users to add unauthorized email addresses to targeted accounts. Certain group-setting fields fail to sanitize user-supplied input before generating a page, but GitLab has not disclosed the specific fields or rendering path. Exploitation requires high privileges, a targeted user's interaction, and special conditions; the bounded consequence is unauthorized account-email modification.

CVSS severity7.3
High
EPSS probability0.26%
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 EE versions allows remote authenticated users to add unauthorized email addresses to targeted accounts. Certain group-setting fields fail to sanitize user-supplied input before generating a page, but GitLab has not disclosed the specific fields or rendering path. Exploitation requires high privileges, a targeted user's interaction, and special conditions; the bounded consequence is unauthorized account-email modification.

The record

CVE
CVE-2026-8589
Published
Jun 11, 2026
Updated
Jun 11, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-79
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 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=13.1.4 <18.10.8
  2. Affected versionversion=18.11 <18.11.5
  3. Affected versionversion=19.0 <19.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

GitLab · GitLabversion=13.1.4 <18.10.8; version=18.11 <18.11.5; version=19.0 <19.0.2

Published CVSS scores

8.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
7.3GitLab Inc.CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/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
Privilegesadmin
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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