{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-46527 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-46527 is a high-severity vulnerability in yhirose cpp-httplib, published on 29 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-46527 and fix it if it is affected.\n\nWhat it is: CVE-2026-46527 is a high-severity vulnerability in yhirose cpp-httplib, published on 29 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-46527 exists.\n\nAffected product: yhirose cpp-httplib. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-46527/ (Markdown: https://insights.sbomify.com/CVE-2026-46527/index.md)","id":"CVE-2026-46527","markdown":"https://insights.sbomify.com/CVE-2026-46527/index.md","name":"CVE-2026-46527","record":{"aliases":["DEBIAN-CVE-2026-46527","GHSA-hg3g-vrg8-578g","UBUNTU-CVE-2026-46527"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"C++ HTTP library","requires_auth":"none","summary":"An attacker can crash the server by sending a malformed X-Forwarded-For header when trusted proxies are configured, causing a null dereference.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"cpp-httplib","vendor":"yhirose"}],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.44.0, When the server has called Server::set_trusted_proxies() with a non-empty trusted-proxy list, an attacker can send an HTTP request that includes an X-Forwarded-For header whose value parses to no valid IP segments. The code path then executes get_client_ip(), which calls front() on an empty std::vector—undefined behavior in C++. On typical implementations this manifests as abnormal process termination (denial of service). With Sanitizers enabled, you get an explicit runtime diagnostic. This vulnerability is fixed in 0.44.0.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Null dereference in cpp-httplib","id":"CVE-2026-46527","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"PDF /GoToR action argv injection enables single-click RCE via --gtk-module dlopen","id":"CVE-2026-46529"},"packages":[],"prev":{"headline":"Local Deep Research: SSRF bypass in `safe_get`","id":"CVE-2026-46526"},"products":["cpp-httplib"],"published":"2026-05-29","related":[{"cvss_score":10,"headline":"cpp-httplib Untrusted HTTP Header Handling: Internal Header Shadowing (REMOTE*/LOCAL*)","id":"CVE-2025-66570","kev_date_added":null,"published":"2025-12-05"},{"cvss_score":9.9,"headline":"cpp-httplib: HTTP header value percent-decoding in server-side `parse_header` enables CRLF injection","id":"CVE-2026-45372","kev_date_added":null,"published":"2026-05-29"},{"cvss_score":8.7,"headline":"cpp-httplib has a Silent TLS Certificate Verification Bypass on HTTPS Redirect via Proxy","id":"CVE-2026-32627","kev_date_added":null,"published":"2026-03-13"},{"cvss_score":8.7,"headline":"cpp-httplib vulnerable to a denial of service (DOS) using a zip bomb","id":"CVE-2026-22776","kev_date_added":null,"published":"2026-01-12"},{"cvss_score":7.7,"headline":"cpp-httplib has CRLF injection in http headers","id":"CVE-2026-21428","kev_date_added":null,"published":"2026-01-01"},{"cvss_score":7.5,"headline":"cpp-httplib Affected by Remote Process Crash via Malformed Content-Length Response Header","id":"CVE-2026-31870","kev_date_added":null,"published":"2026-03-11"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-01","vendors":["yhirose"]},"summary":"An attacker can crash the server by sending a malformed X-Forwarded-For header when trusted proxies are configured, causing a null dereference.","url":"https://insights.sbomify.com/CVE-2026-46527/"}