EEF-CVE-2026-48594

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Source
https://cna.erlef.org/osv/EEF-CVE-2026-48594.html
Import Source
https://cna.erlef.org/osv/EEF-CVE-2026-48594.json
JSON Data
https://api.osv.dev/v1/vulns/EEF-CVE-2026-48594
Aliases
  • CVE-2026-48594
  • GHSA-mc85-72gr-vm9f
Published
2026-06-02T19:08:49.596Z
Modified
2026-06-04T04:45:31.475Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Decompression bomb in Tesla.Middleware.DecompressResponse and Tesla.Middleware.Compression
Details

Summary

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 decompressbody/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, compressionalgorithms/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.

Configuration

The application must include Tesla.Middleware.DecompressResponse or Tesla.Middleware.Compression in its Tesla middleware pipeline.

Database specific 
{
    "cpe_ids": [
        "cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*"
    ],
    "cwe_ids": [
        "CWE-409"
    ],
    "capec_ids": [
        "CAPEC-130"
    ]
}
References
Credits
    • Peter Ullrich - FINDER
    • Yordis Prieto - REMEDIATION_DEVELOPER
    • Jonatan Männchen - ANALYST

Affected packages

Hex / tesla

Package

Name
tesla
Purl
pkg:hex/tesla

Affected ranges

Type
SEMVER
Events
Introduced
0.6.0
Fixed
1.18.3

Affected versions

0.*
0.6.0
0.7.0
0.7.1
0.7.2
0.8.0
0.9.0
0.10.0
1.*
1.0.0-beta.1
1.0.0
1.1.0
1.2.0
1.2.1
1.3.0
1.3.1
1.3.2
1.3.3
1.4.0
1.4.1
1.4.2
1.4.3
1.4.4
1.5.0
1.5.1
1.6.0
1.6.1
1.7.0
1.8.0
1.8.1
1.9.0
1.10.0
1.10.1
1.10.2
1.10.3
1.11.0
1.11.1
1.11.2
1.12.0
1.12.1
1.12.2
1.12.3
1.13.0
1.13.1
1.13.2
1.14.0
1.14.1
1.14.2
1.14.3
1.15.0
1.15.1
1.15.2
1.15.3
1.16.0
1.17.0
1.18.0
1.18.1
1.18.2

Database specific

source 
"https://cna.erlef.org/osv/EEF-CVE-2026-48594.json"

Git / github.com/elixir-tesla/tesla.git

Affected ranges

Type
GIT
Repo
https://github.com/elixir-tesla/tesla.git
Events
Introduced
5bd90bb5cf0d15e375edc2a66fa322292940fce2
Fixed
340f75b5d191dc747ef7ac6365bd002d1cd55a9d

Database specific

source 
"https://cna.erlef.org/osv/EEF-CVE-2026-48594.json"