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CVE-2026-48594— Decompression bomb in Tesla.Middleware.DecompressResponse and Tesla.Middleware.Compression

Quick assessment

Affected
elixir-tesla tesla
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tesla是Elixir Tesla开源的一个HTTP客户端软件。 Tesla 0.6.0版本至1.18.3之前版本存在安全漏洞，该漏洞源于处理高度压缩数据时未限制解压大小，可能导致通过HTTP响应体中的解压炸弹造成拒绝服务。

AI Predicted 7.5 Difficulty: Easy EPSS 0.46% · P38

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 2

VendorProduct Version RangeStatus
elixir-tesla tesla 0.6.0< 1.18.3 affected
5bd90bb5cf0d15e375edc2a66fa322292940fce2< 340f75b5d191dc747ef7ac6365bd002d1cd55a9d affected
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I. Basic Information for CVE-2026-48594

Vulnerability Information
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Vulnerability Title
Decompression bomb in Tesla.Middleware.DecompressResponse and Tesla.Middleware.Compression
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
对高度压缩数据的处理不恰当(数据放大攻击)
Source: CVE Program / CVE List V5
Vulnerability Title
Tesla 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tesla是Elixir Tesla开源的一个HTTP客户端软件。 Tesla 0.6.0版本至1.18.3之前版本存在安全漏洞，该漏洞源于处理高度压缩数据时未限制解压大小，可能导致通过HTTP响应体中的解压炸弹造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
elixir-tesla tesla 0.6.0 ~ 1.18.3 cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*
elixir-tesla tesla 5bd90bb5cf0d15e375edc2a66fa322292940fce2 ~ 340f75b5d191dc747ef7ac6365bd002d1cd55a9d cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-48594

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III. Intelligence Information for CVE-2026-48594

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Patches & Fixes for CVE-2026-48594 (1)

Vendor Advisories for CVE-2026-48594 (2)

Other References for CVE-2026-48594 (1)

Same Patch Batch · elixir-tesla · 2026-06-02 · 5 CVEs total

CVE-2026-48598 CRLF injection in Tesla.Multipart disposition parameters allows multipart part header inje
CVE-2026-48596 CRLF injection in Tesla.Multipart.add_content_type_param/2 allows HTTP header injection
CVE-2026-48595 Authorization header leaks to third-party origin on cross-origin redirect in Tesla.Middlew
CVE-2026-48597 Atom table exhaustion via untrusted URL scheme in Tesla.Adapter.Mint

IV. Related Vulnerabilities

Same product: tesla
Same vendor: elixir-tesla
Same weakness: CWE-409

V. Comments for CVE-2026-48594

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