{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-16027 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-16027 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-16027 is a medium-severity server-side request forgery vulnerability in Revenue Administration E-Signature, published on 7 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-16027 and fix it if it is affected.\n\nWhat it is: CVE-2026-16027 is a medium-severity server-side request forgery vulnerability in Revenue Administration E-Signature, published on 7 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-16027 in the wild and no public exploit code.\n\nAffected product: Revenue Administration E-Signature. 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-2026-16027/ (Markdown: https://insights.sbomify.com/CVE-2026-16027/index.md)","id":"CVE-2026-16027","markdown":"https://insights.sbomify.com/CVE-2026-16027/index.md","name":"CVE-2026-16027","record":{"aliases":["GHSA-jxrw-hc36-36pw"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"E-Signature application","requires_auth":"none","summary":"Unauthenticated attackers can exploit a WebSocket-to-XAdES flaw to perform Server-Side Request Forgery, potentially accessing internal resources.","user_interaction":"required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"TR-CERT","cpe":[],"cvss":{"score":5.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"description":"Server-Side request forgery (SSRF) vulnerability in Revenue Administration Türkiye's E-Signature allows Server Side Request Forgery.\n\nThis issue affects Türkiye's E-Signature: from 2.4.4.0 before 2.5.1.0.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Unauthenticated WebSocket-to-XAdES SSRF in Revenue Administration's E-Signature","id":"CVE-2026-16027","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"ssrf","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Protocol::HTTP2 versions before 1.14 for Perl allow memory exhaustion via closed streams that stream_state never removes from the connection stream table.","id":"CVE-2026-16028"},"packages":[],"prev":{"headline":"Improper Payment Validation in PayTR's PayTR Virtual Pos iFrame API WHMCS Module","id":"CVE-2026-16025"},"products":["E-Signature"],"published":"2026-08-07","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-07","vendors":["Revenue Administration"]},"summary":"Unauthenticated attackers can exploit a WebSocket-to-XAdES flaw to perform Server-Side Request Forgery, potentially accessing internal resources.","url":"https://insights.sbomify.com/CVE-2026-16027/"}