{"id":"CVE-2019-9153","aliases":["GHSA-qwqc-28w3-fww6"],"url":"https://o3.security/vulnerability/CVE-2019-9153","summary":"Message Signature Bypass in openpgp","details":"Versions of `openpgp` prior to 4.2.0 are vulnerable to Message Signature Bypass. The package fails to verify that a message signature is of type `text`. This allows an attacker to to construct a message with a signature type that only verifies subpackets without additional input (such as `standalone` or `timestamp`). For example, an attacker that captures a `standalone` signature packet from a victim can construct arbitrary signed messages that would be verified correctly.\n\n\n## Recommendation\n\nUpgrade to version 4.2.0 or later.\nIf you are upgrading from a version <4.0.0 it is highly recommended to read the `High-Level API Changes` section of the `openpgp` 4.0.0 release: https://github.com/openpgpjs/openpgpjs/releases/tag/v4.0.0","published":"2019-08-22T16:15:10.383Z","modified":"2026-08-14T09:05:35.676291Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"epss":{"score":0.01922,"percentile":0.78093,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"npm","name":"openpgp","fixedVersion":"4.2.0"}],"fix":{"url":"https://github.com/openpgpjs/openpgpjs/pull/797/commits/327d3e5392a6f59a4270569d200c7f7a2bfc4cbc","label":"openpgpjs/openpgpjs#797"},"references":[{"type":"ADVISORY","url":"http://packetstormsecurity.com/files/154191/OpenPGP.js-4.2.0-Signature-Bypass-Invalid-Curve-Attack.html"},{"type":"ADVISORY","url":"https://github.com/openpgpjs/openpgpjs/pull/816"},{"type":"ADVISORY","url":"https://github.com/openpgpjs/openpgpjs/releases/tag/v4.2.0"},{"type":"ADVISORY","url":"https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvelope_Extensions/Mailvelope_Extensions_pdf.html#download=1"},{"type":"FIX","url":"https://github.com/openpgpjs/openpgpjs/pull/797/commits/327d3e5392a6f59a4270569d200c7f7a2bfc4cbc"},{"type":"EVIDENCE","url":"https://sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-openpgp-js/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-9153"},{"type":"WEB","url":"https://sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-openpgp-js"},{"type":"WEB","url":"https://snyk.io/vuln/SNYK-JS-OPENPGP-460248"},{"type":"WEB","url":"https://www.npmjs.com/advisories/1160"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-14T09:05:35.676291Z"}}