FKIE_CVE-2026-49841

Vulnerability from fkie_nvd - Published: 2026-06-09 17:17 - Updated: 2026-06-10 15:07
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.11.1, the mod_verto HTTP request handler allocates a fixed 2 MiB buffer for a POST application/x-www-form-urlencoded body but accepts Content-Length up to just under 10 MiB. The body-read loop is bounded by Content-Length rather than the buffer size, producing an attacker-controlled heap overflow of up to ~8 MiB -- before the HTTP basic-auth check runs. This issue has been patched in version 1.11.1.
References
security-advisories@github.comhttps://github.com/signalwire/freeswitch/releases/tag/v1.11.1Release Notes
security-advisories@github.comhttps://github.com/signalwire/freeswitch/security/advisories/GHSA-wfrq-qvg2-f88fThird Party Advisory
Impacted products
Vendor Product Version
freeswitch freeswitch *
To clipboard 

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          "cpeMatch": [
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              "criteria": "cpe:2.3:a:freeswitch:freeswitch:*:*:*:*:*:*:*:*",
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  "descriptions": [
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      "lang": "en",
      "value": "FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.11.1, the mod_verto HTTP request handler allocates a fixed 2 MiB buffer for a POST application/x-www-form-urlencoded body but accepts Content-Length up to just under 10 MiB. The body-read loop is bounded by Content-Length rather than the buffer size, producing an attacker-controlled heap overflow of up to ~8 MiB -- before the HTTP basic-auth check runs. This issue has been patched in version 1.11.1."
    }
  ],
  "id": "CVE-2026-49841",
  "lastModified": "2026-06-10T15:07:23.493",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
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  "published": "2026-06-09T17:17:47.870",
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      "tags": [
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
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        {
          "lang": "en",
          "value": "CWE-131"
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      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
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}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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