{"answers":{"affected":"3 open source packages ship an affected version, including pyload-ng.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48737 exists.","fix":"No fix has been published for CVE-2026-48737 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-48737 is a medium-severity server-side request forgery vulnerability in pyload, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-48737 and fix it if it is affected.\n\nWhat it is: CVE-2026-48737 is a medium-severity server-side request forgery vulnerability in pyload, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48737 exists.\n\nAffected packages and fixed versions:\n- pyload-ng (PyPI): affected all versions up to 0.5.0b3.dev100; no fix listed\n- pyload-ng (PyPI): affected all versions up to 0.5.0b3.dev100; no fix listed\n- pyload-ng (PyPI): affected all versions up to 0.5.0b3.dev100; 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-2026-48737/ (Markdown: https://insights.sbomify.com/CVE-2026-48737/index.md)","id":"CVE-2026-48737","markdown":"https://insights.sbomify.com/CVE-2026-48737/index.md","name":"CVE-2026-48737","record":{"aliases":["GHSA-m5x5-28jr-gpjj","PYSEC-2026-2995"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["data_read","denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"pyLoad download manager","requires_auth":"low_privilege","summary":"Attackers can bypass SSRF protections in pyLoad using IPv6 transition addresses to access internal networks or cloud metadata.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":4.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"description":"pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev101, is_global_address in src/pyload/core/utils/web/check.py relies on Python's global-address classification without examining IPv4 destinations embedded in 6to4 or NAT64 IPv6 addresses. A low-privileged user can submit an IPv6 literal through parse_urls to the pre-resolution is_global_host guard. Because host_to_ip is pinned to AF_INET, that guard does not evaluate a hostname's AAAA result. Separately, curl resolves hostnames before the pycurl PREREQFUNC in src/pyload/core/network/http/http_request.py applies the same vulnerable is_global_address check to the actual connection address, so a transition-form AAAA result can be permitted even when it terminates at an embedded loopback, private, CGNAT, or link-local IPv4 address. Exploitation requires the pyLoad host to route the applicable transition mechanism, including 6to4 on affected Python 3.9 through 3.11 deployments or NAT64 on a network with a NAT64 gateway. Successful exploitation can enable internal-network reconnaissance, timing-based confirmation, limited service disruption, or cloud metadata disclosure where the wrapped address is routable. This issue is fixed in version 0.5.0b3.dev101.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"pyLoad: SSRF guard bypass via IPv6 6to4/NAT64 transition wrappers of internal IPs","id":"CVE-2026-48737","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"ssrf","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"libIEC61850: Remote NULL dereference in MMS Read alternate-access sub-array path leads to server-side DoS","id":"CVE-2026-48741"},"packages":[{"ecosystem":"PyPI","fixed":[],"introduced":["0"],"last_affected":["0.5.0b3.dev100"],"package":"pyload-ng","purl":null,"source":"GHSA-m5x5-28jr-gpjj"},{"ecosystem":"PyPI","fixed":[],"introduced":["0"],"last_affected":["0.5.0b3.dev100"],"package":"pyload-ng","purl":"pkg:pypi/pyload-ng","source":"GHSA-m5x5-28jr-gpjj"},{"ecosystem":"PyPI","fixed":[],"introduced":["0"],"last_affected":["0.5.0b3.dev100"],"package":"pyload-ng","purl":"pkg:pypi/pyload-ng","source":"PYSEC-2026-2995"}],"prev":{"headline":"Symfony: IpUtils::PRIVATE_SUBNETS Omits IPv6 Transition Forms (6to4, NAT64, Teredo, IPv4-compatible): SSRF Bypass in NoPrivateNetworkHttpClient","id":"CVE-2026-48736"},"products":["pyload"],"published":"2026-09-15","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":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"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":"2026-09-16","vendors":["pyload"]},"summary":"Attackers can bypass SSRF protections in pyLoad using IPv6 transition addresses to access internal networks or cloud metadata.","url":"https://insights.sbomify.com/CVE-2026-48737/"}