GHSA-5WX9-6P5V-7R76

Vulnerability from github – Published: 2026-02-26 18:31 – Updated: 2026-02-27 15:34
VLAI?
Details

Golioth Firmware SDK version 0.10.0 prior to 0.22.0, fixed in commit 48f521b, contain a stack-based buffer overflow in Payload Utils. The golioth_payload_as_int() and golioth_payload_as_float() helpers copy network-supplied payload data into fixed-size stack buffers using memcpy() with a length derived from payload_size. The only length checks are guarded by assert(); in release builds, the asserts are compiled out and memcpy() may copy an unbounded payload_size. Payloads larger than 12 bytes (int) or 32 bytes (float) can overflow the stack, resulting in a crash/denial of service. This is reachable via LightDB State on_payload with a malicious server or MITM.

Severity ?
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
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{
  "affected": [],
  "aliases": [
    "CVE-2026-23747"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-121"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-26T18:23:06Z",
    "severity": "MODERATE"
  },
  "details": "Golioth Firmware SDK version 0.10.0 prior to 0.22.0, fixed in commit\u00a048f521b, contain a stack-based buffer overflow in Payload Utils. The golioth_payload_as_int() and golioth_payload_as_float() helpers copy network-supplied payload data into fixed-size stack buffers using memcpy() with a length derived from payload_size. The only length checks are guarded by assert(); in release builds, the asserts are compiled out and memcpy() may copy an unbounded payload_size. Payloads larger than 12 bytes (int) or 32 bytes (float) can overflow the stack, resulting in a crash/denial of service. This is reachable via LightDB State on_payload with a malicious server or MITM.",
  "id": "GHSA-5wx9-6p5v-7r76",
  "modified": "2026-02-27T15:34:17Z",
  "published": "2026-02-26T18:31:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23747"
    },
    {
      "type": "WEB",
      "url": "https://github.com/golioth/golioth-firmware-sdk/commit/48f521bcc0187ada2b9cbdad31dc380e6c7b7332"
    },
    {
      "type": "WEB",
      "url": "https://blog.secmate.dev/posts/golioth-vulnerabilities-disclosure"
    },
    {
      "type": "WEB",
      "url": "https://github.com/golioth/golioth-firmware-sdk/releases/tag/v0.22.0"
    },
    {
      "type": "WEB",
      "url": "https://secmate.dev/disclosures/SECMATE-2025-0015"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/golioth-firmware-sdk-payload-utils-stack-based-buffer-overflow"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}


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Detection rules are retrieved from Rulezet.