Improper Verification of a Cryptographic Signature in OpenPGP.js <=4.1.2 allows an…
Priority LOW 37CWE-347Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-347.
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.
Why it matters now
EPSS 0.02013 81st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed openpgp (npm): 4.2.0
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | openpgp (npm) | before 4.2.0 | 4.2.0 | Patch available | GHSA-qwqc-28w3-fww6 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- openpgp (npm) Vendor— Affected before 4.2.0 Fixed in 4.2.0 Patch available GHSA-qwqc-28w3-fww6
Remediation
- Fix · GHSA-qwqc-28w3-fww6 openpgp (npm) Fixed in 4.2.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2019-9153
- 2026-10-03 Alias added: GHSA-qwqc-28w3-fww6
References
Patch 1
Advisory 4
- https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvelope_Extensions/Mailvelope_Extensions_pdf.html#download=1
- https://github.com/openpgpjs/openpgpjs/pull/816
- http://packetstormsecurity.com/files/154191/OpenPGP.js-4.2.0-Signature-Bypass-Invalid-Curve-Attack.html
- https://nvd.nist.gov/vuln/detail/CVE-2019-9153
More Openpgpjs vulnerabilities
- TI-2015-06663 s2k.js in OpenPGP.js will decrypt arbitrary messages regardless of passphrase for crafted… CVSS 3.0HIGH 7.5
- TI-2019-06618 Improper Verification of a Cryptographic Signature in OpenPGP.js <=4.1.2 allows an… CVSS 3.0HIGH 7.5
- TI-2019-06619 A cryptographic issue in OpenPGP.js <=4.2.0 allows an attacker who is able provide forged… CVSS 3.0MEDIUM 5.9
- TI-2023-21663 Cleartext Signed Message Signature Spoofing in openpgpjs CVSS 3.1MEDIUM 4.3
Sources
- CVE-2019-9153 · CVE Program
- CVE-2019-9153 · NVD
- FIRST EPSS
- GHSA-qwqc-28w3-fww6 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences