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.
CVSS
No CVSS.
References
Configurations
No configuration.
History
03 Jun 2026, 16:16
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/elixir-tesla/tesla/security/advisories/GHSA-mc85-72gr-vm9f - |
02 Jun 2026, 20:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-02 20:16
Updated : 2026-06-04 15:42
NVD link : CVE-2026-48594
Mitre link : CVE-2026-48594
CVE.ORG link : CVE-2026-48594
JSON object : View
Products Affected
No product.
CWE
CWE-409
Improper Handling of Highly Compressed Data (Data Amplification)