{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-103399 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-103399 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 30 Sep 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-2026-103399 and fix it if it is affected.\n\nWhat it is: CVE-2026-103399 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 30 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-103399 in the wild and no public exploit code.\n\nAffected product: Red Hat Enterprise Linux 10. 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-2026-103399/ (Markdown: https://insights.sbomify.com/CVE-2026-103399/index.md)","id":"CVE-2026-103399","markdown":"https://insights.sbomify.com/CVE-2026-103399/index.md","name":"CVE-2026-103399","record":{"aliases":["AZL-105543","DEBIAN-CVE-2026-103399","ECHO-0353-a267-f75e","GHSA-mfgq-q7gx-p678","UBUNTU-CVE-2026-103399"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["other"],"network_reachable":"yes","non_default_config":false,"product_category":"libsoup HTTP library","requires_auth":"none","summary":"Remote attackers can smuggle HTTP requests via undrained bodies in SoupServer, causing unintended request processing on keep-alive connections.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[],"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-444","name":"Inconsistent Interpretation of HTTP Requests"}],"description":"A flaw was found in SoupServer (libsoup). When an HTTP/1.x client sends a request with Expect: 100-continue and a request body, and SoupServer returns an early final (non-1xx) response before the body is read, the server neither drains the declared body bytes nor closes the connection. On a keep-alive connection, those leftover bytes are interpreted as a subsequent HTTP request. A remote, unauthenticated attacker can place a complete HTTP request in the body and cause SoupServer to process that smuggled request, leading to unintended request handling.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Libsoup: soupserver: http/1 request smuggling via undrained expect: 100-continue body","id":"CVE-2026-103399","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"other","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"An Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerability in the ember service in","id":"CVE-2026-103400"},"packages":[],"prev":{"headline":"OpenSave through 2.4.0 Arbitrary File Read and Write via Peer-Controlled Save Path","id":"CVE-2026-103398"},"products":["Red Hat Enterprise Linux 10","Red Hat Enterprise Linux 6","Red Hat Enterprise Linux 7","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 9"],"published":"2026-09-30","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-30","vendors":["Red Hat"]},"summary":"Remote attackers can smuggle HTTP requests via undrained bodies in SoupServer, causing unintended request processing on keep-alive connections.","url":"https://insights.sbomify.com/CVE-2026-103399/"}