Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AC AV A C I PR S UI CVSS EPSS %ile KEV L N N L N N U N 5.3 .0167 76.4 YES
AFFECTED Product Versions Fixed n/a n/a – —
TIMELINE Jul 2 Reserved by mitre Jul 2 Published (CNA: mitre) Jul 23 Added to CISA KEV, remediation due 2024-08-13
In the Twilio Authy API, accessed by Authy Android before 25.1.0 and Authy iOS before 26.1.0, an unauthenticated endpoint provided access to certain phone-number data, as exploited in the wild in June 2024. Specifically, the endpoint accepted a stream of requests containing phone numbers, and responded with information about whether each phone number was registered with Authy. (Authy accounts were not compromised, however.)
| Date | Event | Detail |
|---|---|---|
| July 2, 2024 | Reserved | Reserved by mitre |
| July 2, 2024 | Published | Published (CNA: mitre) |
| July 23, 2024 | KEV ADDED | Added to CISA KEV, remediation due 2024-08-13 |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| n/a | n/a | — | n/a | — |
Authoritative record: CVE-2024-39891 at cve.org
Weaknesses: CWE-203
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2024-39891 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
