CVE-2026-48594: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in elixir-tesla tesla allows a denial of service via decompression bomb in HTTP…

PriorityP347high8.2CVSS 4.0

AVNACLATPPRNUINVCNVINVAHSCNSINSANEXCRXIRXARXMAVXMACXMATXMPRXMUIXMVCXMVIXMVAXMSCXMSIXMSAXSXAUXRXVXREXUX

EPSS

0.33%

24.9th percentile

Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in elixir-tesla tesla allows a denial of service via decompression bomb in HTTP response bodies. When Tesla.Middleware.DecompressResponse or Tesla.Middleware.Compression is included in a Tesla middleware pipeline, HTTP response bodies are decompressed eagerly with no size limit. The decompress_body/2 function in lib/tesla/middleware/compression.ex passes the entire response body to :zlib.gunzip/1 or :zlib.unzip/1 without any cap on the output size. Additionally, compression_algorithms/1 splits the content-encoding header on commas and decompress_body/2 recurses once per token, applying a decompression pass on each iteration. A server advertising content-encoding: gzip, gzip, gzip, gzip causes four recursive decompression passes, yielding exponential amplification: each gzip layer can expand its input roughly 1000x, so a payload of a few hundred bytes on the wire inflates to gigabytes of BEAM heap, exhausting memory and crashing or freezing the calling process. This issue affects tesla: from 0.6.0 before 1.18.3.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
elixir-tesla	tesla	>= 0.6.0 < 1.18.3	1.18.3
elixir-tesla	tesla	>= 5bd90bb5cf0d15e375edc2a66fa322292940fce2 < 340f75b5d191dc747ef7ac6365bd002d1cd55a9d	340f75b5d191dc747ef7ac6365bd002d1cd55a9d
nvidia	tesla	>= 0.6.0 < 1.18.3	1.18.3

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