{"id":"CVE-2026-48594","revision":null,"records":[{"revision":"85995fcf71634854a04f3e3ec9cf9667","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-48594","aliases":[],"title":"Decompression bomb in Tesla.Middleware.DecompressResponse and Tesla.Middleware.Compression","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.\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.","state":0,"publishedAt":"2026-06-02T19:08:49.596+00:00","modifiedAt":"2026-09-24T20:50:12.704+00:00","affected":[{"ecosystem":"https://repo.hex.pm","name":"tesla","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"collectionURL\": \"https://repo.hex.pm\",\n                    \"cpes\": [\n                        \"cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*\"\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"modules\": [\n                        \"'Elixir.Tesla.Middleware.Compression'\",\n                        \"'Elixir.Tesla.Middleware.DecompressResponse'\"\n                    ],\n                    \"packageName\": \"tesla\",\n                    \"packageURL\": \"pkg:hex/tesla\",\n                    \"product\": \"tesla\",\n                    \"programFiles\": [\n                        \"lib/tesla/middleware/compression.ex\"\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"'Elixir.Tesla.Middleware.DecompressResponse':call/3\"\n                        },\n                        {\n                            \"name\": \"'Elixir.Tesla.Middleware.Compression':call/3\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/elixir-tesla/tesla\",\n                    \"vendor\": \"elixir-tesla\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"1.18.3\",\n                            \"status\": \"affected\",\n                            \"version\": \"0.6.0\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"https://github.com","name":"elixir-tesla/tesla","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"collectionURL\": \"https://github.com\",\n                    \"cpes\": [\n                        \"cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*\"\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"modules\": [\n                        \"'Elixir.Tesla.Middleware.Compression'\",\n                        \"'Elixir.Tesla.Middleware.DecompressResponse'\"\n                    ],\n                    \"packageName\": \"elixir-tesla/tesla\",\n                    \"packageURL\": \"pkg:github/elixir-tesla/tesla\",\n                    \"product\": \"tesla\",\n                    \"programFiles\": [\n                        \"lib/tesla/middleware/compression.ex\"\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"'Elixir.Tesla.Middleware.DecompressResponse':call/3\"\n                        },\n                        {\n                            \"name\": \"'Elixir.Tesla.Middleware.Compression':call/3\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/elixir-tesla/tesla\",\n                    \"vendor\": \"elixir-tesla\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"340f75b5d191dc747ef7ac6365bd002d1cd55a9d\",\n                            \"status\": \"affected\",\n                            \"version\": \"5bd90bb5cf0d15e375edc2a66fa322292940fce2\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":8.2,"severity":"HIGH"}],"references":["https://github.com/elixir-tesla/tesla/security/advisories/GHSA-mc85-72gr-vm9f","https://cna.erlef.org/cves/CVE-2026-48594.html","https://osv.dev/vulnerability/EEF-CVE-2026-48594","https://github.com/elixir-tesla/tesla/commit/5bd90bb5cf0d15e375edc2a66fa322292940fce2","https://github.com/elixir-tesla/tesla/commit/340f75b5d191dc747ef7ac6365bd002d1cd55a9d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-48594","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-48594","identifiers":["CVE-2026-48594"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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