{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43970", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "state": "PUBLISHED", "assignerShortName": "EEF", "dateReserved": "2026-05-04T18:23:25.574Z", "datePublished": "2026-05-13T18:43:11.640Z", "dateUpdated": "2026-05-15T04:33:30.898Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://repo.hex.pm", "cpes": ["cpe:2.3:a:ninenines:cowlib:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["cow_spdy"], "packageName": "cowlib", "packageURL": "pkg:hex/cowlib", "product": "cowlib", "programFiles": ["src/cow_spdy.erl"], "programRoutines": [{"name": "cow_spdy:parse/2"}, {"name": "cow_spdy:inflate/2"}, {"name": "cow_spdy:parse_headers/2"}, {"name": "cow_spdy:parse_headers/4"}], "repo": "https://github.com/ninenines/cowlib", "vendor": "ninenines", "versions": [{"lessThan": "2.16.1", "status": "affected", "version": "0.1.0", "versionType": "semver"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:ninenines:cowlib:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["cow_spdy"], "packageName": "ninenines/cowlib", "packageURL": "pkg:github/ninenines/cowlib", "product": "cowlib", "programFiles": ["src/cow_spdy.erl"], "programRoutines": [{"name": "cow_spdy:parse/2"}, {"name": "cow_spdy:inflate/2"}, {"name": "cow_spdy:parse_headers/2"}, {"name": "cow_spdy:parse_headers/4"}], "repo": "https://github.com/ninenines/cowlib", "vendor": "ninenines", "versions": [{"lessThan": "16aad3fb9f81f5cda4d1706ff0c54237c619c282", "status": "affected", "version": "fad5c0049df278cc498b6cdb519b09e845a070a8", "versionType": "git"}]}], "configurations": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>The application must use <tt>cow_spdy:parse/2</tt> to parse SPDY frames from an untrusted peer. cowboy itself does not use <tt>cow_spdy</tt>; only direct callers of the <tt>cow_spdy</tt> API are affected.</p>"}], "value": "The application must use cow_spdy:parse/2 to parse SPDY frames from an untrusted peer. cowboy itself does not use cow_spdy; only direct callers of the cow_spdy API are affected."}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:ninenines:cowlib:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.16.1", "versionStartIncluding": "0.1.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Peter Ullrich"}, {"lang": "en", "type": "remediation developer", "value": "Lo\u00efc Hoguin"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in ninenines cowlib allows unauthenticated remote denial of service via memory exhaustion.</p><p><tt>cow_spdy:inflate/2</tt> in cowlib passes peer-supplied compressed bytes directly to <tt>zlib:inflate/2</tt> with no output size bound. 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