{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-54891", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "state": "PUBLISHED", "assignerShortName": "EEF", "dateReserved": "2026-06-16T10:47:13.915Z", "datePublished": "2026-07-02T16:06:30.982Z", "dateUpdated": "2026-07-02T17:24:50.025Z"}, "containers": {"cna": {"affected": [{"cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["tls_gen_connection"], "packageName": "ssl", "packageURL": "pkg:otp/ssl?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git", "product": "OTP", "programFiles": ["src/tls_gen_connection.erl"], "programRoutines": [{"name": "tls_gen_connection:handle_protocol_record/3"}], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"changes": [{"at": "11.7.3", "status": "unaffected"}, {"at": "11.6.0.3", "status": "unaffected"}, {"at": "11.2.12.10", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "5.3.4", "versionType": "otp"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["tls_gen_connection"], "packageName": "erlang/otp", "packageURL": "pkg:github/erlang/otp", "product": "OTP", "programFiles": ["lib/ssl/src/tls_gen_connection.erl"], "programRoutines": [{"name": "tls_gen_connection:handle_protocol_record/3"}], "repo": "https://github.com/erlang/otp", "vendor": "Erlang", "versions": [{"changes": [{"at": "29.0.3", "status": "unaffected"}, {"at": "28.5.0.3", "status": "unaffected"}, {"at": "27.3.4.14", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "17.0", "versionType": "otp"}, {"lessThan": "07d2d0e93f6aaf7652a81e8df075fc1728da5e96", "status": "affected", "version": "84adefa331c4159d432d22840663c38f155cd4c1", "versionType": "git"}]}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "versionEndExcluding": "27.3.4.14", "versionStartIncluding": "17.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "versionEndExcluding": "28.5.0.3", "versionStartIncluding": "28.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "versionEndExcluding": "29.0.3", "versionStartIncluding": "29.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Lukas Backstr\u00f6m"}, {"lang": "en", "type": "remediation developer", "value": "Ingela Anderton Andin"}, {"lang": "en", "type": "remediation reviewer", "value": "Dan Gudmundsson"}, {"lang": "en", "type": "remediation reviewer", "value": "Jakub Witczak"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Improper Enforcement of Message Integrity During Transmission in a Communication Channel vulnerability in Erlang/OTP ssl (tls_gen_connection module) allows a network-positioned attacker to inject unauthenticated plaintext that the TLS client application later treats as authenticated server data.</p><p>The function <tt>tls_gen_connection:handle_protocol_record/3</tt> rejects <tt>APPLICATION_DATA</tt> records that arrive in pre-handshake states when the TLS endpoint acts as a server, but does not apply the same check when the endpoint acts as a client. 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