FKIE_CVE-2026-28435

Vulnerability from fkie_nvd - Published: 2026-03-04 20:16 - Updated: 2026-03-05 22:09
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.35.0, cpp-httplib (httplib.h) does not enforce Server::set_payload_max_length() on the decompressed request body when using HandlerWithContentReader (streaming ContentReader) with Content-Encoding: gzip (or other supported encodings). A small compressed payload can expand beyond the configured payload limit and be processed by the application, enabling a payload size limit bypass and potential denial of service (CPU/memory exhaustion). This vulnerability is fixed in 0.35.0.
References
security-advisories@github.comhttps://github.com/yhirose/cpp-httplib/commit/c99d7472b5cf4869d3897b9afc9792063a3d15a8Patch
security-advisories@github.comhttps://github.com/yhirose/cpp-httplib/security/advisories/GHSA-xvfx-w463-6fppExploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
yhirose cpp-httplib *
To clipboard 

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      "value": "cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.35.0, cpp-httplib (httplib.h) does not enforce Server::set_payload_max_length() on the decompressed request body when using HandlerWithContentReader (streaming ContentReader) with Content-Encoding: gzip (or other supported encodings). A small compressed payload can expand beyond the configured payload limit and be processed by the application, enabling a payload size limit bypass and potential denial of service (CPU/memory exhaustion). This vulnerability is fixed in 0.35.0."
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      "lang": "es",
      "value": "cpp-httplib es una librer\u00eda HTTP/HTTPS multiplataforma de un solo archivo de cabecera C++11. Antes de la versi\u00f3n 0.35.0, cpp-httplib (httplib.h) no aplica Server::set_payload_max_length() en el cuerpo de la solicitud descomprimido al usar HandlerWithContentReader (ContentReader de transmisi\u00f3n) con Content-Encoding: gzip (u otras codificaciones compatibles). Una peque\u00f1a carga \u00fatil comprimida puede expandirse m\u00e1s all\u00e1 del l\u00edmite de carga \u00fatil configurado y ser procesada por la aplicaci\u00f3n, lo que permite una omisi\u00f3n del l\u00edmite de tama\u00f1o de la carga \u00fatil y una potencial denegaci\u00f3n de servicio (agotamiento de CPU/memoria). Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 0.35.0."
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  ],
  "id": "CVE-2026-28435",
  "lastModified": "2026-03-05T22:09:45.190",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "impactScore": 3.6,
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  "published": "2026-03-04T20:16:19.983",
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      "source": "security-advisories@github.com",
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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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.



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