{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"High" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"cpp-httplib security update", "category":"general", "title":"Synopsis" }, { "text":"An update for cpp-httplib is now available for openEuler-24.03-LTS-SP1", "category":"general", "title":"Summary" }, { "text":"A C++11 single-file header-only cross platform HTTP/HTTPS library. It's extremely easy to setup. Just include httplib.h file in your code!\n\nSecurity Fix(es):\n\ncpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.35.0, when a request handler throws a C++ exception and the application has not registered a custom exception handler via set_exception_handler(), the library catches the exception and writes its message directly into the HTTP response as a header named EXCEPTION_WHAT. This header is sent to whoever made the request, with no authentication check and no special configuration required to trigger it. The behavior is on by default. A developer who does not know to opt in to set_exception_handler() will ship a server that leaks internal exception messages to any client. This vulnerability is fixed in 0.35.0.(CVE-2026-28434)\n\ncpp-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.(CVE-2026-28435)\n\ncpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.37.0, cpp-httplib uses std::regex (libstdc++) to parse RFC 5987 encoded filename* values in multipart Content-Disposition headers. The regex engine in libstdc++ implements backtracking via deep recursion, consuming one stack frame per input character. An attacker can send a single HTTP POST request with a crafted filename* parameter that causes uncontrolled stack growth, resulting in a stack overflow (SIGSEGV) that crashes the server process. This issue has been patched in version 0.37.0.(CVE-2026-29076)", "category":"general", "title":"Description" }, { "text":"An update for cpp-httplib is now available for master/openEuler-22.03-LTS-SP4/openEuler-24.03-LTS/openEuler-24.03-LTS-Next/openEuler-24.03-LTS-SP1/openEuler-24.03-LTS-SP2/openEuler-24.03-LTS-SP3.\n\nopenEuler Security has rated this update as having a security impact of high. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section.", "category":"general", "title":"Topic" }, { "text":"High", "category":"general", "title":"Severity" }, { "text":"cpp-httplib", "category":"general", "title":"Affected Component" } ], "publisher":{ "issuing_authority":"openEuler security committee", "name":"openEuler", "namespace":"https://www.openeuler.org", "contact_details":"openeuler-security@openeuler.org", "category":"vendor" }, "references":[ { "summary":"openEuler-SA-2026-1552", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1552" }, { "summary":"CVE-2026-28434", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-28434&packageName=cpp-httplib" }, { "summary":"CVE-2026-28435", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-28435&packageName=cpp-httplib" }, { "summary":"CVE-2026-29076", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-29076&packageName=cpp-httplib" }, { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-28434" }, { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-28435" }, { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-29076" }, { "summary":"openEuler-SA-2026-1552 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/advisories/2026/csaf-openeuler-sa-2026-1552.json" } ], "title":"An update for cpp-httplib is now available for openEuler-24.03-LTS-SP1", "tracking":{ "initial_release_date":"2026-03-15T13:56:16+08:00", "revision_history":[ { "date":"2026-03-15T13:56:16+08:00", "summary":"Initial", "number":"1.0.0" } ], 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"name":"cpp-httplib-devel-0.37.0-1.oe2403sp1.x86_64 as a component of openEuler-24.03-LTS-SP1" }, "category":"default_component_of" } ] }, "vulnerabilities":[ { "cve":"CVE-2026-28434", "notes":[ { "text":"cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.35.0, when a request handler throws a C++ exception and the application has not registered a custom exception handler via set_exception_handler(), the library catches the exception and writes its message directly into the HTTP response as a header named EXCEPTION_WHAT. This header is sent to whoever made the request, with no authentication check and no special configuration required to trigger it. The behavior is on by default. A developer who does not know to opt in to set_exception_handler() will ship a server that leaks internal exception messages to any client. This vulnerability is fixed in 0.35.0.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-24.03-LTS-SP1:cpp-httplib-0.37.0-1.oe2403sp1.aarch64", "openEuler-24.03-LTS-SP1:cpp-httplib-debuginfo-0.37.0-1.oe2403sp1.aarch64", "openEuler-24.03-LTS-SP1:cpp-httplib-debugsource-0.37.0-1.oe2403sp1.aarch64", "openEuler-24.03-LTS-SP1:cpp-httplib-devel-0.37.0-1.oe2403sp1.aarch64", "openEuler-24.03-LTS-SP1:cpp-httplib-0.37.0-1.oe2403sp1.src", "openEuler-24.03-LTS-SP1:cpp-httplib-0.37.0-1.oe2403sp1.x86_64", "openEuler-24.03-LTS-SP1:cpp-httplib-debuginfo-0.37.0-1.oe2403sp1.x86_64", "openEuler-24.03-LTS-SP1:cpp-httplib-debugsource-0.37.0-1.oe2403sp1.x86_64", "openEuler-24.03-LTS-SP1:cpp-httplib-devel-0.37.0-1.oe2403sp1.x86_64" ] }, "remediations":[ { "product_ids":{"$ref":"$.vulnerabilities[0].product_status.fixed"}, "details":"cpp-httplib security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1552" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"MEDIUM", "baseScore":5.3, "vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version":"3.1" }, "products":{"$ref":"$.vulnerabilities[0].product_status.fixed"} } ], "threats":[ { "details":"Medium", "category":"impact" } ], "title":"CVE-2026-28434" }, { "cve":"CVE-2026-28435", "notes":[ { "text":"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.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":{"$ref":"$.vulnerabilities[0].product_status.fixed"} }, "remediations":[ { "product_ids":{"$ref":"$.vulnerabilities[0].product_status.fixed"}, "details":"cpp-httplib security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1552" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"HIGH", "baseScore":7.5, "vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version":"3.1" }, "products":{"$ref":"$.vulnerabilities[0].product_status.fixed"} } ], "threats":[ { "details":"High", "category":"impact" } ], "title":"CVE-2026-28435" }, { "cve":"CVE-2026-29076", "notes":[ { "text":"cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.37.0, cpp-httplib uses std::regex (libstdc++) to parse RFC 5987 encoded filename* values in multipart Content-Disposition headers. The regex engine in libstdc++ implements backtracking via deep recursion, consuming one stack frame per input character. An attacker can send a single HTTP POST request with a crafted filename* parameter that causes uncontrolled stack growth, resulting in a stack overflow (SIGSEGV) that crashes the server process. This issue has been patched in version 0.37.0.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":{"$ref":"$.vulnerabilities[0].product_status.fixed"} }, "remediations":[ { "product_ids":{"$ref":"$.vulnerabilities[0].product_status.fixed"}, "details":"cpp-httplib security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1552" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"MEDIUM", "baseScore":5.9, "vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version":"3.1" }, "products":{"$ref":"$.vulnerabilities[0].product_status.fixed"} } ], "threats":[ { "details":"Medium", "category":"impact" } ], "title":"CVE-2026-29076" } ] }