Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L N R U H H H 8.8 .9998 100.0 YES
AFFECTED Product Versions Fixed Chrome 116.0.5845.187 – — libwebp 1.3.2 – —
TIMELINE Sep 9 Reserved by Chrome Sep 12 Published (CNA: Chrome) Sep 13 Added to CISA KEV, remediation due 2023-10-04
Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Critical)
| Date | Event | Detail |
|---|---|---|
| September 9, 2023 | Reserved | Reserved by Chrome |
| September 12, 2023 | Published | Published (CNA: Chrome) |
| September 13, 2023 | KEV ADDED | Added to CISA KEV, remediation due 2023-10-04 |
Authoritative record: CVE-2023-4863 at cve.org
Vendors: google
Weaknesses: CWE-787
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2023-4863 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 Sunday, October 4, 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.
