{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-25961 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-25961 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-25961 is a high-severity vulnerability in sumatrapdfreader sumatrapdf, published on 9 Feb 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-2026-25961 and fix it if it is affected.\n\nWhat it is: CVE-2026-25961 is a high-severity vulnerability in sumatrapdfreader sumatrapdf, published on 9 Feb 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-2026-25961 in the wild and no public exploit code.\n\nAffected product: sumatrapdfreader sumatrapdf. 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-2026-25961/ (Markdown: https://insights.sbomify.com/CVE-2026-25961/index.md)","id":"CVE-2026-25961","markdown":"https://insights.sbomify.com/CVE-2026-25961/index.md","name":"CVE-2026-25961","record":{"aliases":["GHSA-xpm2-rr5m-x96q"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"PDF reader","requires_auth":"none","summary":"A network attacker can intercept update requests to inject malicious installers, leading to arbitrary code execution on Windows systems.","user_interaction":"required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"sumatrapdf","vendor":"sumatrapdfreader"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-494","name":"Download of Code Without Integrity Check"},{"id":"CWE-295","name":"Improper Certificate Validation"}],"description":"SumatraPDF is a multi-format reader for Windows. In 3.5.0 through 3.5.2, SumatraPDF's update mechanism disables TLS hostname verification (INTERNET_FLAG_IGNORE_CERT_CN_INVALID) and executes installers without signature checks. A network attacker with any valid TLS certificate (e.g., Let's Encrypt) can intercept the update check request, inject a malicious installer URL, and achieve arbitrary code execution.","ecosystems":[],"exploits":{"exploitdb":1,"first_seen":"2026-02-10","github_poc":1,"max_poc_stars":2,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-02-10T08:36:32Z","kind":"github_poc","ref":"https://github.com/mbanyamer/CVE-2026-25961-SumatraPDF-3.5.0---3.5.2-RCE","stars":2,"title":"SumatraPDF versions 3.5.0 to 3.5.2 disable TLS hostname verification during update checks #   (using INTERNET_FLAG_IGNORE_CERT_CN_INVALID) and do not perform any signature or integrity #   validation on the downloaded installer."},{"date":"2026-04-30","kind":"exploitdb","ref":"52535","stars":null,"title":"SumatraPDF 3.5.2 - Remote Code Execution"}],"tier":"poc_unverified"},"has_fix":false,"headline":"SumatraPDF Update MITM -\u003e Arbitrary Code Execution","id":"CVE-2026-25961","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"MarkUs: Zip bomb in config upload enables DoS","id":"CVE-2026-25962"},"packages":[],"prev":{"headline":"SSRF Protection Bypass in vLLM","id":"CVE-2026-25960"},"products":["sumatrapdf"],"published":"2026-02-09","related":[{"cvss_score":9.3,"headline":"Memory corruption in n/a","id":"CVE-2012-4895","kev_date_added":null,"published":"2012-10-05"},{"cvss_score":9.3,"headline":"Memory corruption in n/a","id":"CVE-2012-4896","kev_date_added":null,"published":"2012-10-05"},{"cvss_score":9.3,"headline":"Memory corruption in n/a","id":"CVE-2009-4117","kev_date_added":null,"published":"2009-12-01"},{"cvss_score":8.6,"headline":"SumatraPDF has an Untrusted Search Path in sumatrapdf/src/AppTools.cpp","id":"CVE-2026-23512","kev_date_added":null,"published":"2026-01-14"},{"cvss_score":7.8,"headline":"Untrusted Search Path in SumatraPDF Reader (explorer.exe on Windows)","id":"CVE-2026-25880","kev_date_added":null,"published":"2026-02-09"},{"cvss_score":7.8,"headline":"Use after free in n/a","id":"CVE-2013-2830","kev_date_added":null,"published":"2018-02-08"}],"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)"},{"class":"attribution","licence":"GPL-2.0-or-later","name":"Exploit-DB"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-02-10","vendors":["sumatrapdfreader"]},"summary":"A network attacker can intercept update requests to inject malicious installers, leading to arbitrary code execution on Windows systems.","url":"https://insights.sbomify.com/CVE-2026-25961/"}