CVE-2026-65627

The record

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. The 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. Decompression 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. This issue affects jose: from 1.0.0 before 1.11.13.

Affected packages

Related vulnerabilities

• CVE-2026-118761 Kubeflow Pipelines enables users to build and deploy portable, scalable machine learning… CWE-409
• CVE-2026-118261 Echo is a Go web framework. CWE-409
• CVE-2026-111073 The broker-side PushTelemetry API (KIP-714) validates only the compressed size of a… CWE-409
• CVE-2026-116662 Tanium addressed a compression bomb vulnerability in Enforce. CWE-409
• CVE-2026-116579 Autobahn Python is a WebSocket and WAMP implementation for Python that supports Twisted… CWE-409
• CVE-2026-116175 vLLM from 0.19.0 before 0.24.0 contains a decompression bomb vulnerability because the… CWE-409
• CVE-2026-115638 OpenStack Ironic through 39.0.1 allows a denial of service via a configdrive that results… CWE-409
• CVE-2026-115503 Ghidra before 12.2 contains an improper handling of highly compressed data vulnerability… CWE-409