CVE-2019-9153 json
Message Signature Bypass in openpgp
published 2019-08-22 7 y ago modified 2026-06-17 4 mo ago also GHSA-qwqc-28w3-fww6 , EUVD-2019-0640
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.0%
- EPSS 2.0% chance of exploitation in 30 days, percentile 81%
- public exploits
- 0
- none known
Summary
Improper Verification of a Cryptographic Signature in OpenPGP.js <=4.1.2 allows an attacker to forge signed messages by replacing its signatures with a "standalone" or "timestamp" signature.
Patch / fix
- npm openpgp 4.2.0
- github.com/openpgpjs/openpgpjs#797 commit
- github.com/openpgpjs/openpgpjs#816 pull request
- github.com/openpgpjs/openpgpjs/releases/tag/v4.2.0 release
Exploit prediction
2.01% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- sec-consult.com https://sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-openpgp-js/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
| GitHub | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | openpgp | <4.2.0 |
4.2.0 |
Classification
- Weakness
-
- CWE-347 Improper Verification of Cryptographic Signature
References
-
github.com
/openpgpjs/openpgpjs/pull/816
web, third-party-advisory
-
github.com
/openpgpjs/openpgpjs/pull/797/commits/327d3e5392a6f59a4270569d200c7f7a2bfc4cbc
web, patch, third-party-advisory
-
sec-consult.com
/en/blog/advisories/multiple-vulnerabilities-in-openpgp-js/
exploit, third-party-advisory
-
bsi.bund.de
/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvelope_Extensions/Mailvelope_Extensions_pdf.html#downloa
web, third-party-advisory
-
github.com
/openpgpjs/openpgpjs/releases/tag/v4.2.0
web, release-notes
-
packetstormsecurity.com
/files/154191/OpenPGP.js-4.2.0-Signature-Bypass-Invalid-Curve-Attack.html
web, third-party-advisory, vdb-entry
-
nvd.nist.gov
/vuln/detail/CVE-2019-9153
advisory
-
sec-consult.com
/en/blog/advisories/multiple-vulnerabilities-in-openpgp-js
web
-
snyk.io
/vuln/SNYK-JS-OPENPGP-460248
web
-
npmjs.com
/advisories/1160
web
Sources
- CVE List CVE-2019-9153
- GitHub Advisory GHSA-qwqc-28w3-fww6
- NVD CVE-2019-9153
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.