{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-45372 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-45372 is a critical 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-2026-45372 and fix it if it is affected.\n\nWhat it is: CVE-2026-45372 is a critical 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-2026-45372 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-2026-45372/ (Markdown: https://insights.sbomify.com/CVE-2026-45372/index.md)","id":"CVE-2026-45372","markdown":"https://insights.sbomify.com/CVE-2026-45372/index.md","name":"CVE-2026-45372","record":{"aliases":["DEBIAN-CVE-2026-45372","GHSA-xjxg-64p4-vj4m","UBUNTU-CVE-2026-45372","USN-8470-1"],"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 inject CRLF sequences into HTTP headers via percent-encoded values, potentially enabling response splitting or header manipulation.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"cpp-httplib","vendor":"yhirose"}],"cvss":{"score":9.9,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:L","version":"3.1"},"cwes":[{"id":"CWE-93","name":"Improper Neutralization of CRLF Sequences"},{"id":"CWE-444","name":"Inconsistent Interpretation of HTTP Requests"}],"description":"cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.44.0, when cpp-httplib's server parses an incoming request, it applies percent-decoding to every header value except Location and Referer. The validity check (is_field_value) is run before decoding, so encoded %0D%0A passes the check and is then expanded to a literal \\r\\n byte pair inside the stored header value. 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":"cpp-httplib: HTTP header value percent-decoding in server-side `parse_header` enables CRLF injection","id":"CVE-2026-45372","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"other","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"CodeWhale: SSRF‌ IPV6 bypass","id":"CVE-2026-45373"},"packages":[],"prev":{"headline":"SiYuan: SiYuan publish-mode Reader can mutate Conf and SQL index via 8 ungated APIs","id":"CVE-2026-45371"},"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":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":"2026-06-01","vendors":["yhirose"]},"summary":"Attackers can inject CRLF sequences into HTTP headers via percent-encoded values, potentially enabling response splitting or header manipulation.","url":"https://insights.sbomify.com/CVE-2026-45372/"}