{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2026-12860 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-12860 is a high-severity vulnerability in Bouncycastle Bc-Java, published on 3 Aug 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-2026-12860 and fix it if it is affected.\n\nWhat it is: CVE-2026-12860 is a high-severity vulnerability in Bouncycastle Bc-Java, published on 3 Aug 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-2026-12860 in the wild and no public exploit code.\n\nAffected product: Bouncycastle Bc-Java. 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-2026-12860/ (Markdown: https://insights.sbomify.com/CVE-2026-12860/index.md)","id":"CVE-2026-12860","markdown":"https://insights.sbomify.com/CVE-2026-12860/index.md","name":"CVE-2026-12860","record":{"aliases":["CLEANSTART-2026-GU33200","CLEANSTART-2026-IW98421","CLEANSTART-2026-LA60535","CLEANSTART-2026-SW32419","CLEANSTART-2026-TN87218","DEBIAN-CVE-2026-12860","GHSA-cggx-vw4r-j93f","UBUNTU-CVE-2026-12860"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Java cryptography library","requires_auth":"none","summary":"Attackers can bypass RSA PKCS#1 signature verification in Bouncy Castle for Java by exploiting a flaw that skips hash bytes in specific paths.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"bcorg","cpe":[{"product":"bc-java","vendor":"bouncycastle"},{"product":"bouncy_castle_for_java_lts","vendor":"bouncycastle"}],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/U:Amber","version":"4.0"},"cwes":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature"}],"description":"In Bouncy Castle for Java before 1.85, RSA PKCS#1 verification skips last two hash bytes in NULL-omitted path. This issue also affects Bouncy Castle for Java LTS before 2.73.12.","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":"RSA PKCS#1 verification skips last two hash bytes in NULL-omitted path","id":"CVE-2026-12860","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"bouncycastle:bc-java","products":["bouncycastle:bc-java"],"type":"security_feature_bypass","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"XLSX formula injection in exports","id":"CVE-2026-12862"},"packages":[],"prev":{"headline":"IDOR in Caz Informatics' Advancity ALMS Cloud","id":"CVE-2026-12859"},"products":["BC-JAVA","BC-LTS-JAVA"],"published":"2026-08-03","related":[{"cvss_score":10,"headline":"Legion of the Bouncy Castle Java Cryptography API Bleichenbacher Oracle Vulnerability","id":"CVE-2007-6721","kev_date_added":null,"published":"2009-03-30"},{"cvss_score":9.8,"headline":"Deserialization of Untrusted Data in Bouncy castle","id":"CVE-2018-1000613","kev_date_added":null,"published":"2018-07-09"},{"cvss_score":9.3,"headline":"Stapled OCSP response accepted without binding to the checked certificate","id":"CVE-2026-58062","kev_date_added":null,"published":"2026-08-03"},{"cvss_score":9.3,"headline":"JSSE hostname verifier CN-fallback enabled by default despite documented opt-in","id":"CVE-2026-59638","kev_date_added":null,"published":"2026-08-03"},{"cvss_score":9.3,"headline":"MTI/A0 DH agreement exponentiates unvalidated peer value","id":"CVE-2026-59650","kev_date_added":null,"published":"2026-08-03"},{"cvss_score":9.3,"headline":"Name Constraints bypass via trailing dot in rfc822Name and URI","id":"CVE-2026-8763","kev_date_added":null,"published":"2026-08-03"},{"cvss_score":8.7,"headline":"MLS membership checks compare a uint32 leaf_index as signed, admitting an out-of-range sender","id":"CVE-2026-17507","kev_date_added":null,"published":"2026-10-02"}],"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)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-03","vendors":["Legion of the Bouncy Castle Inc."]},"summary":"Attackers can bypass RSA PKCS#1 signature verification in Bouncy Castle for Java by exploiting a flaw that skips hash bytes in specific paths.","url":"https://insights.sbomify.com/CVE-2026-12860/"}