What is CVE-2019-16992?

CVE-2019-16992 is a high-severity vulnerability in Keybase, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2019-09-30.

How severe is CVE-2019-16992?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Keybase

CVE-2019-16992

The Keybase app 2.13.2 for iOS provides potentially insufficient notice that it is employing a user's private key to sign a certain cryptocurrency attestation (that an address at keybase.io can be used for Stellar payments to the user), which might be incompatible with a user's personal position on the semantics of an attestation.

Published 2019-09-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (60.6th percentile), scored 2026-10-26.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Keybase — versions 2.13.2

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

sneak.berlin/20190929/keybase-backdoor/ (Third Party Advisory)
github.com/keybase/keybase-issues/issues/3583 (Third Party Advisory)

Frequently asked questions

What is CVE-2019-16992?: CVE-2019-16992 is a high-severity vulnerability in Keybase, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2019-09-30.
How severe is CVE-2019-16992?: High severity. CVSS v3 base score is 7.5 out of 10.