{"schema":"threatline.record/2","record":{"id":"CVE-2026-65627","aliases":["GHSA-wfpv-qxp8-x5gm"],"summary":"Decompression bomb via unbounded zlib:inflate in jose_jwe_zip:uncompress/2","details":"Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in potatosalad jose (erlang-jose) allows a remote attacker to exhaust a node's memory with a small crafted JWE token.\n\nThe jose_jwe_zip:uncompress/2 function in src/jwe/jose_jwe_zip.erl decompresses the DEFLATE-compressed plaintext of a JWE that carries the optional zip: DEF header by calling zlib:inflate/2 on the entire attacker-controlled stream, with no bound on the output size or the inflation ratio. Raw DEFLATE reaches ratios around 1000:1 on highly repetitive input, so a few-kilobyte token inflates to hundreds of megabytes or gigabytes in a single call.\n\nDecompression runs automatically during decryption through jose_jwe:block_decrypt/2 (JOSE.JWE.block_decrypt/2 in Elixir), before the recipient can inspect or reject the payload. With the common asymmetric key-management algorithms (RSA-OAEP, ECDH-ES) an attacker needs only the recipient's public key to craft such a token, so no authentication or secret material is required. A single small token can exhaust the node's memory and crash the BEAM, denying service to all users.\n\nThis issue affects jose: from 1.0.0 before 1.11.13.","categories":["Unclassified"],"product":"jose","vendor":"potatosalad","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-65627","source_modified_at":"2026-10-26T19:53:16.336Z","fetched_at":"2026-10-26T23:45:56.352924Z","product":"jose","vendor":"potatosalad","versions":[{"lessThan":"1.11.13","status":"affected","version":"1.0.0","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-65627","source_modified_at":"2026-10-26T19:53:16.336Z","fetched_at":"2026-10-26T23:45:56.352924Z","product":"jose","vendor":"potatosalad","versions":[{"lessThan":"857eb8e7f2d33e2c9ca2189e77226561cacaf2ad","status":"affected","version":"a7746ecd4950f85a393136e449a91dac62b5c429","versionType":"git"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-65627","source_modified_at":"2026-10-26T19:53:16.336Z","fetched_at":"2026-10-26T23:45:56.352924Z","package":{"name":"jose","ecosystem":null},"version":"1.11.13","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-65627","source_modified_at":"2026-10-26T19:53:16.336Z","fetched_at":"2026-10-26T23:45:56.352924Z","package":{"name":"jose","ecosystem":null},"version":"857eb8e7f2d33e2c9ca2189e77226561cacaf2ad","basis":"first unaffected version stated in the CVE record"}],"cvss":6.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-26T19:53:16.336Z","modified_at":"2026-10-26T19:53:16.336Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-65627","fetched_at":"2026-10-26T23:45:56.352924Z","source_modified_at":"2026-10-26T19:53:16.336Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://github.com/potatosalad/erlang-jose/security/advisories/GHSA-wfpv-qxp8-x5gm","tags":["vendor-advisory","related"]},{"source":"CVE List","url":"https://cna.erlef.org/cves/CVE-2026-65627.html","tags":["related"]},{"source":"CVE List","url":"https://osv.dev/vulnerability/EEF-CVE-2026-65627","tags":["related"]},{"source":"CVE List","url":"https://github.com/potatosalad/erlang-jose/commit/a7746ecd4950f85a393136e449a91dac62b5c429","tags":["related"]},{"source":"CVE List","url":"https://github.com/potatosalad/erlang-jose/commit/857eb8e7f2d33e2c9ca2189e77226561cacaf2ad","tags":["patch"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-26T19:53:16.336Z","content_hash":"8453d46895fd2cd7aa6d250eecb4ddd9d915b64eb9e1eca0a2bd3d16a7d64741"}}