{"answers":{"affected":"2 open source packages ship an affected version, including ssrfcheck.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43929 exists.","fix":"No fix has been published for CVE-2026-43929 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-43929 is a high-severity server-side request forgery vulnerability in felippe-regazio ssrfcheck, published on 12 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-2026-43929 and fix it if it is affected.\n\nWhat it is: CVE-2026-43929 is a high-severity server-side request forgery vulnerability in felippe-regazio ssrfcheck, published on 12 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-2026-43929 exists.\n\nAffected packages and fixed versions:\n- ssrfcheck (npm): affected all versions up to 1.3.0; no fix listed\n- ssrfcheck (npm): affected all versions up to 1.3.0; no fix listed\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-2026-43929/ (Markdown: https://insights.sbomify.com/CVE-2026-43929/index.md)","id":"CVE-2026-43929","markdown":"https://insights.sbomify.com/CVE-2026-43929/index.md","name":"CVE-2026-43929","record":{"aliases":["GHSA-j4rj-2jr5-m439"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Node.js SSRF check library","requires_auth":"none","summary":"Attackers can bypass SSRF protections in ssrfcheck using IPv4-mapped IPv6 addresses to access internal resources or cloud metadata.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"},{"id":"CWE-184","name":"Incomplete List of Disallowed Inputs"}],"description":"ssrfcheck is a library that checks if a string contains a potential SSRF attack. In 1.3.0 and earlier, ssrfcheck fails to block Server-Side Request Forgery attacks when the target private IP address is encoded as an IPv4-mapped IPv6 address (e.g. http://[::ffff:127.0.0.1]/). The WHATWG URL parser built into Node.js silently normalizes the IPv4 notation inside the brackets to compressed hex form ([::ffff:7f00:1]) before the library's private-IP regex ever runs. The regex was written to match dot-notation only and therefore never matches any real input — all seven IANA private IPv4 ranges, including the AWS/GCP/Azure metadata address 169.254.169.254, are bypassed. Any application using isSSRFSafeURL() to guard HTTP requests made with user-supplied URLs is fully exposed to SSRF.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"ssrfcheck: Server-Side Request Forgery (SSRF) and Incomplete List of Disallowed Inputs","id":"CVE-2026-43929","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"ssrf","year":"2026"},"n_packages":2,"n_references":1,"next":{"headline":"Parse Server: MFA SMS one-time password accepted twice under concurrent login","id":"CVE-2026-43930"},"packages":[{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":["1.3.0"],"package":"ssrfcheck","purl":null,"source":"GHSA-j4rj-2jr5-m439"},{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":["1.3.0"],"package":"ssrfcheck","purl":"pkg:npm/ssrfcheck","source":"GHSA-j4rj-2jr5-m439"}],"prev":{"headline":"FOSSBilling: Payment amount not validated in PayPalEmail adapter allows invoice underpayment","id":"CVE-2026-43928"},"products":["ssrfcheck"],"published":"2026-05-12","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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":"2026-05-13","vendors":["felippe-regazio"]},"summary":"Attackers can bypass SSRF protections in ssrfcheck using IPv4-mapped IPv6 addresses to access internal resources or cloud metadata.","url":"https://insights.sbomify.com/CVE-2026-43929/"}