{"id":"CVE-2026-48594","title":"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.\n\nWhen Tesla.Middleware.DecompressResponse or Tesla.Middleware…","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.\n\nWhen Tesla.Middleware.DecompressResponse or Tesla.Middleware…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-409"],"vendor":"elixir-tesla","product":"tesla","affected":["tesla >= 0.6.0, < 1.18.3"],"patched":["tesla 1.18.3"],"published":"2026-06-02","updated":"2026-09-24","sourceUpdated":"2026-09-24T21:17:12.963","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-48594","references":[{"url":"https://cna.erlef.org/cves/CVE-2026-48594.html","label":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db"},{"url":"https://github.com/elixir-tesla/tesla/commit/340f75b5d191dc747ef7ac6365bd002d1cd55a9d","label":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db"},{"url":"https://github.com/elixir-tesla/tesla/commit/5bd90bb5cf0d15e375edc2a66fa322292940fce2","label":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db"},{"url":"https://github.com/elixir-tesla/tesla/security/advisories/GHSA-mc85-72gr-vm9f","label":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db"},{"url":"https://osv.dev/vulnerability/EEF-CVE-2026-48594","label":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db"},{"url":"https://github.com/elixir-tesla/tesla/security/advisories/GHSA-mc85-72gr-vm9f","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48594"},{"url":"https://github.com/advisories/GHSA-mc85-72gr-vm9f"}],"tags":["nvd","cve.org","ghsa","erlang"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-06-03T14:39:48.594599Z"},"scores":{"nvd":7.5,"cna":8.2},"epss":0.00455,"epssPercentile":0.39333,"aliases":["GHSA-mc85-72gr-vm9f"],"ecosystem":"erlang","ingestedAt":"2026-07-10T00:54:12.242Z","slug":"CVE-2026-48594","body":"## Overview\n\nImproper Handling of Highly Compressed Data (Data Amplification) vulnerability in elixir-tesla tesla allows a denial of service via decompression bomb in HTTP response bodies.\n\nWhen 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.\n\nThis issue affects tesla: from 0.6.0 before 1.18.3.\n\n## Affected\n\n- `tesla >= 0.6.0, < 1.18.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `tesla 1.18.3`\n\n## Package advisory (CVE-2026-48594)\n\nAffected packages:\n\n- `tesla >= 0.6.0, < 1.18.3`\n\nPatched in:\n\n- `tesla 1.18.3`\n\nSource: https://github.com/advisories/GHSA-mc85-72gr-vm9f","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":210380,"id":"CVE-2026-48594","ts":1790286814716,"field":"cvss","old":null,"new":"7.5"}]}