{"answers":{"affected":"1 open source package ship an affected version, including jose.","exploited":"There is no known exploitation of CVE-2026-65625 in the wild and no public exploit code.","fix":"Upgrade jose to 1.11.13 or later.","what":"CVE-2026-65625 is a medium-severity vulnerability in potatosalad jose, published on 26 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-65625 and fix it if it is affected.\n\nWhat it is: CVE-2026-65625 is a medium-severity vulnerability in potatosalad jose, published on 26 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-65625 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- jose (Hex): affected from 1.2.0; fixed in 1.11.13\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-2026-65625/ (Markdown: https://insights.sbomify.com/CVE-2026-65625/index.md)","id":"CVE-2026-65625","markdown":"https://insights.sbomify.com/CVE-2026-65625/index.md","name":"CVE-2026-65625","record":{"aliases":["DEBIAN-CVE-2026-65625","EEF-CVE-2026-65625","GHSA-6gxw-6f7r-cjr6","UBUNTU-CVE-2026-65625"],"analysis":null,"analysis_generated_by":null,"assigner":"EEF","cpe":[],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-354","name":"Improper Validation of Integrity Check Value"}],"description":"The pure-Erlang AES-GCM fallback in jose_jwa_aes derives the number of verified authentication tag bits from the attacker-supplied tag itself. In the {aes_gcm, Bits} clause of block_decrypt/4, the incoming tag is guarded only by is_binary/1, with no check on its length. Verification in gcm_block_decrypt/6 then computes TBits = bit_size(T) and compares only those bits of the real 128-bit tag. An attacker who controls a JWE token can truncate the authentication tag to as little as 8 bits, so only 8 bits are ever checked. This reduces forgery resistance from 2^-128 to 2^-8, and a forged ciphertext is reliably accepted as authentic within 256 attempts without knowledge of the key (an authentication tag forgery and integrity bypass). Supplying a tag longer than 128 bits instead causes a badmatch that crashes the decrypting process. The fallback is reached through the public JWE decryption path whenever AES-GCM is not provided by a native crypto NIF, for example on FIPS or stripped or older OTP builds.\n\nThis issue affects jose: from 1.2.0 before 1.11.13.","ecosystems":["Hex"],"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":"Attacker-controlled AES-GCM authentication tag length allows tag forgery in jose","id":"CVE-2026-65625","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Hex","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":5,"next":{"headline":"Bleichenbacher padding oracle in RSAES-PKCS1-v1_5 decryption in jose","id":"CVE-2026-65626"},"packages":[{"ecosystem":"Hex","fixed":["1.11.13"],"introduced":["1.2.0"],"last_affected":[],"package":"jose","purl":"pkg:hex/jose","source":"EEF-CVE-2026-65625"}],"prev":{"headline":"Cowboy HTTP/1.1 max_headers Bypass via Duplicate Header Names Enables Memory Exhaustion","id":"CVE-2026-65624"},"products":["jose"],"published":"2026-10-26","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Erlang Ecosystem Foundation","prefix":"EEF"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-26","vendors":["potatosalad"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-65625/"}