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Mallory
Medium

GitLab CE/EE Service Desk email template Support Bot impersonation and content injection

IdentifiersCVE-2026-9694CWE-116

CVE-2026-9694 is an improper neutralization flaw in GitLab Community Edition and Enterprise Edition Service Desk email template processing. It affects all versions from 15.9 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2. Under certain conditions, a remote unauthenticated attacker can send a specially crafted Service Desk email reply that is processed in a way that does not properly neutralize attacker-controlled content, allowing the attacker to impersonate the GitLab Support Bot and inject arbitrary content into the resulting message flow.

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ANALYST BRIEF

Impact, mitigation & remediation

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Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an unauthenticated attacker to spoof or impersonate the GitLab Support Bot in the Service Desk workflow and inject arbitrary attacker-controlled content into email-driven communications. The primary impact is integrity and trust compromise of Service Desk communications, which could mislead recipients, facilitate phishing or social engineering, and cause unauthorized or deceptive content to appear as if it originated from GitLab’s support automation.

Mitigation

If you can’t patch tonight, do this now.

If immediate upgrade is not possible, reduce exposure by restricting or disabling vulnerable Service Desk email reply processing where operationally feasible, tightly controlling inbound email paths to Service Desk, and monitoring for anomalous replies or messages appearing to originate from the GitLab Support Bot. These are temporary risk-reduction measures; the definitive fix is upgrading to a patched version.

Remediation

Patch, then assume compromise.

Upgrade GitLab CE/EE to a fixed release. Patched versions are 18.10.8, 18.11.5, and 19.0.2 or later, depending on the deployment branch. GitLab advised self-managed customers to upgrade immediately. GitLab.com was already patched at the time of disclosure, and GitLab Dedicated customers did not need to take action.
PUBLIC EXPLOITS

Exploits

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VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

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VendorProductType
GitLabGitlabapplication

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Threat actor evidence

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Associated malware

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Detection signatures

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Social activity3

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