CVE-2026-48594
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
teslaHex | >= 0.6.0, < 1.18.3 | 1.18.3 |
Affected products
2cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*range: >=0.6.0,<1.18.3
- (no CPE)range: from 0.6.0 before 1.18.3
Patches
Vulnerability mechanics
References
6- github.com/elixir-tesla/tesla/commit/340f75b5d191dc747ef7ac6365bd002d1cd55a9dnvdPatchWEB
- cna.erlef.org/cves/CVE-2026-48594.htmlnvdThird Party AdvisoryWEB
- github.com/advisories/GHSA-mc85-72gr-vm9fghsaADVISORY
- github.com/elixir-tesla/tesla/security/advisories/GHSA-mc85-72gr-vm9fnvdVendor AdvisoryExploitWEB
- nvd.nist.gov/vuln/detail/CVE-2026-48594ghsaADVISORY
- osv.dev/vulnerability/EEF-CVE-2026-48594nvdThird Party AdvisoryWEB
News mentions
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