CVE-2019-9153

Name: CVE-2019-9153
Creator: NVD / NIST
Published: 2019-08-22T16:15:10.383+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.01%

Last modified Jun 17, 2026

CVE-2019-9153 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.01% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

2.01%

78.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-347

Affected Software

Vendor	Product	Versions
Openpgpjs	Openpgpjs	<= 4.1.2

References

http://packetstormsecurity.com/files/154191/OpenPGP.js-4.2.0-Signature-Bypass-Invalid-Curve-Attack.htmlThird Party Advisory, VDB Entry
https://github.com/openpgpjs/openpgpjs/pull/797/commits/327d3e5392a6f59a4270569d200c7f7a2bfc4cbcPatch, Third Party Advisory
https://github.com/openpgpjs/openpgpjs/pull/816Third Party Advisory
https://github.com/openpgpjs/openpgpjs/releases/tag/v4.2.0Release Notes
https://sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-openpgp-js/Exploit, Third Party Advisory
https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvelope_Extensions/Mailvelope_Extensions_pdf.html#download=1Third Party Advisory
http://packetstormsecurity.com/files/154191/OpenPGP.js-4.2.0-Signature-Bypass-Invalid-Curve-Attack.htmlThird Party Advisory, VDB Entry
https://github.com/openpgpjs/openpgpjs/pull/797/commits/327d3e5392a6f59a4270569d200c7f7a2bfc4cbcPatch, Third Party Advisory
https://github.com/openpgpjs/openpgpjs/pull/816Third Party Advisory
https://github.com/openpgpjs/openpgpjs/releases/tag/v4.2.0Release Notes
https://sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-openpgp-js/Exploit, Third Party Advisory
https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvelope_Extensions/Mailvelope_Extensions_pdf.html#download=1Third Party Advisory

Timeline

Published: Aug 22, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-9153?

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.

How severe is CVE-2019-9153?

Severity scoring for CVE-2019-9153 is pending analysis. The EPSS model estimates a 2.01% probability of exploitation in the next 30 days.

How do I fix CVE-2019-9153?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-9153?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST