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    2 vulnerabilities found for templates by appwrite

    CVE-2026-72861 (GCVE-0-2026-72861)

    Vulnerability from nvd – Published: 2026-08-20 19:48 – Updated: 2026-08-21 21:45
    VLAI
    Title
    Appwrite Templates github-issue-bot Skips Webhook Signature Verification When the X-Hub-Signature-256 Header Is Absent
    Summary
    The github-issue-bot templates in appwrite/templates verify the GitHub webhook signature with an inverted condition. verifyWebhook in node/github-issue-bot/src/github.js and in node-typescript/github-issue-bot/src/github.ts returns "typeof signature !== 'string' || (await verify(...))", so when the X-Hub-Signature-256 header is absent the first operand is true, the logical OR short-circuits, and the function reports success without performing any HMAC verification. main.js rejects a request only when verifyWebhook returns false, so an unauthenticated request carrying no signature passes the check. Processing then continues to postComment, which takes the repository and issue objects directly from the request body, letting the caller direct the deployed function to post a comment on a repository and issue of their choosing using the configured GITHUB_TOKEN, with the issue author login from the body interpolated into the comment text.
    Severity
    5.8 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
    6.9 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-21 21:33 UTC
    CWE
    • CWE-347 - Improper Verification of Cryptographic Signature
    Assigner
    References
    Impacted products
    Vendor Product Version
    appwrite templates Affected: 0 , ≤ 1.1.2 (semver)
    		Create a notification for this product.
    Date Public
    2026-05-26 00:00
    Credits
    potdf-bl4ck-570rm
    Show details on NVD website
    To clipboard 

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        "title": "CISA ADP Vulnrichment"
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          "url": "https://github.com/appwrite/templates/issues/350"
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        {
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          "name": "VulnCheck Advisory: Appwrite Templates github-issue-bot Skips Webhook Signature Verification When the X-Hub-Signature-256 Header Is Absent",
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      ],
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    "dateReserved": "2026-08-10T15:16:31.372Z",
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  },
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}

    CVE-2026-72861 (GCVE-0-2026-72861)

    Vulnerability from cvelistv5 – Published: 2026-08-20 19:48 – Updated: 2026-08-21 21:45
    VLAI
    Title
    Appwrite Templates github-issue-bot Skips Webhook Signature Verification When the X-Hub-Signature-256 Header Is Absent
    Summary
    The github-issue-bot templates in appwrite/templates verify the GitHub webhook signature with an inverted condition. verifyWebhook in node/github-issue-bot/src/github.js and in node-typescript/github-issue-bot/src/github.ts returns "typeof signature !== 'string' || (await verify(...))", so when the X-Hub-Signature-256 header is absent the first operand is true, the logical OR short-circuits, and the function reports success without performing any HMAC verification. main.js rejects a request only when verifyWebhook returns false, so an unauthenticated request carrying no signature passes the check. Processing then continues to postComment, which takes the repository and issue objects directly from the request body, letting the caller direct the deployed function to post a comment on a repository and issue of their choosing using the configured GITHUB_TOKEN, with the issue author login from the body interpolated into the comment text.
    Severity
    5.8 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
    6.9 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-08-21 21:33 UTC
    CWE
    • CWE-347 - Improper Verification of Cryptographic Signature
    Assigner
    References
    Impacted products
    Vendor Product Version
    appwrite templates Affected: 0 , ≤ 1.1.2 (semver)
    		Create a notification for this product.
    Date Public
    2026-05-26 00:00
    Credits
    potdf-bl4ck-570rm
    Show details on NVD website
    To clipboard 

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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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