CVE-2026-9694 (GCVE-0-2026-9694)

Vulnerability from cvelistv5 – Published: 2026-06-11 10:19 – Updated: 2026-06-11 12:38
VLAI?
Title
Improper Neutralization of Substitution Characters in GitLab
Summary
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.9 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions, could have allowed an unauthenticated user to impersonate the GitLab Support Bot and inject arbitrary content via a specially crafted Service Desk email reply due to improper neutralization in email template processing.
Severity ?
2.6 (Low)
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N
CWE
  • CWE-153 - Improper Neutralization of Substitution Characters
Assigner
References
Impacted products
Vendor Product Version
GitLab GitLab Affected: 15.9 , < 18.10.8 (semver)
Affected: 18.11 , < 18.11.5 (semver)
Affected: 19.0 , < 19.0.2 (semver)
    cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
 Create a notification for this product.
Credits
Thanks [3nvz](https://hackerone.com/3nvz) for reporting this vulnerability through our HackerOne bug bounty program
Show details on NVD website
To clipboard 

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            "other": {
              "content": {
                "id": "CVE-2026-9694",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-11T12:38:47.898774Z",
                "version": "2.0.3"
              },
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        "providerMetadata": {
          "dateUpdated": "2026-06-11T12:38:55.300Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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          "repo": "git://git@gitlab.com:gitlab-org/gitlab.git",
          "vendor": "GitLab",
          "versions": [
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      "credits": [
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          "type": "finder",
          "value": "Thanks [3nvz](https://hackerone.com/3nvz) for reporting this vulnerability through our HackerOne bug bounty program"
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        }
      ],
      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 2.6,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N",
            "version": "3.1"
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      "problemTypes": [
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              "description": "CWE-153: Improper Neutralization of Substitution Characters",
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      "providerMetadata": {
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        "orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
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      },
      "references": [
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          "url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/601330"
        },
        {
          "name": "HackerOne Bug Bounty Report #3685720",
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        },
        {
          "url": "https://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/"
        }
      ],
      "solutions": [
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          "lang": "en",
          "value": "Upgrade to versions 18.10.8, 18.11.5, 19.0.2 or above."
        }
      ],
      "title": "Improper Neutralization of Substitution Characters in GitLab"
    }
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  "cveMetadata": {
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    "datePublished": "2026-06-11T10:19:46.466Z",
    "dateReserved": "2026-05-27T11:03:58.975Z",
    "dateUpdated": "2026-06-11T12:38:55.300Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.