{"id":"AZL-111152","summary":"CVE-2026-65627 affecting package jose 14-3","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.","modified":"2026-10-29T05:35:47Z","published":"2026-10-26T20:17:58Z","upstream":["CVE-2026-65627"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65627"}],"affected":[{"package":{"name":"jose","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/jose"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"14-3"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-111152.json"}}],"schema_version":"1.9.2"}