{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-66577 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2025-66577 is a medium-severity vulnerability in yhirose cpp-httplib, published on 5 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-66577 and fix it if it is affected.\n\nWhat it is: CVE-2025-66577 is a medium-severity vulnerability in yhirose cpp-httplib, published on 5 Dec 2025. 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-2025-66577 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-2025-66577/ (Markdown: https://insights.sbomify.com/CVE-2025-66577/index.md)","id":"CVE-2025-66577","markdown":"https://insights.sbomify.com/CVE-2025-66577/index.md","name":"CVE-2025-66577","record":{"aliases":["DEBIAN-CVE-2025-66577","ECHO-ee91-3948-5c74","GHSA-gfpf-r66f-5mh2","UBUNTU-CVE-2025-66577"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_modify","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"C++ HTTP library","requires_auth":"none","summary":"Attackers can spoof client IP addresses via HTTP headers, poisoning logs and potentially bypassing IP-based authorization checks in applications using cpp-httplib.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"cpp-httplib","vendor":"yhirose"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-807","name":"Reliance on Untrusted Inputs in a Security Decision"},{"id":"CWE-117","name":"Improper Output Neutralization for Logs"}],"description":"cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability allows attacker-controlled HTTP headers to influence server-visible metadata, logging, and authorization decisions. An attacker can supply X-Forwarded-For or X-Real-IP headers which get accepted unconditionally by get_client_ip() in docker/main.cc, causing access and error logs (nginx_access_logger / nginx_error_logger) to record spoofed client IPs (log poisoning / audit evasion). This vulnerability is fixed in 0.27.0.","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":"cpp-httplib Untrusted HTTP Header Handling: X-Forwarded-For/X-Real-IP Trust","id":"CVE-2025-66577","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2025"},"n_packages":0,"n_references":2,"next":{"headline":"robrichards/xmlseclibs has an Libxml2 Canonicalization error which can bypass Digest/Signature validation","id":"CVE-2025-66578"},"packages":[],"prev":{"headline":"Remote Keyboard Desktop 1.0.1 - Remote Code Execution (RCE)","id":"CVE-2025-66576"},"products":["cpp-httplib"],"published":"2025-12-05","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":"Null dereference in cpp-httplib","id":"CVE-2026-46527","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":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-12-05","vendors":["yhirose"]},"summary":"Attackers can spoof client IP addresses via HTTP headers, poisoning logs and potentially bypassing IP-based authorization checks in applications using cpp-httplib.","url":"https://insights.sbomify.com/CVE-2025-66577/"}