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Weekly Signal
Live intelligence Updated 19 Aug 2026 · 20:27 UTC

Bandisoft, Bentley, Debian +6 more · Honeyview, Seequent Leapfrog, Debian Linux +10 more

CVE-2023-4863

Google Chromium WebP Heap-Based Buffer Overflow Vulnerability

Recommended action

Validate affected assets and exposure now, then remediate on an accelerated schedule. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

View response plan
CVSS8.8
EPSS99.7%
KEVYes
ExploitationConfirmed exploitation
PatchPatch or guidance available ↓

Assessment

Why it matters

CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 99.7%; technical severity is CVSS 8.8.

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)

Who should care

  • Teams operating Honeyview, Seequent Leapfrog, Debian Linux +10 more
  • Vulnerability and exposure management teams
  • Security operations teams monitoring exploitation activity

Response plan

What I would do

  1. Confirm whether Honeyview, Seequent Leapfrog, Debian Linux +10 more is present in the environment.
  2. Identify affected versions and establish whether vulnerable services are exposed or reachable.
  3. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  4. Review relevant security telemetry for evidence of attempted or successful exploitation.
  5. Document the remediation decision and track it to verified completion.

Vendor remediation

Patch and remediation links

Use the vendor source below to confirm the correct fixed version, package or mitigation for your affected product.

Technical details

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
CWE-787
Affected versions
Bandisoft Honeyview (End Excluding: 5.51); Bentley Seequent Leapfrog (End Excluding: 2023.2); Debian Debian Linux (Version: 12.0); Fedoraproject Fedora (Version: 39); Google Chrome (End Excluding: 116.0.5845.187); Google Chromium WebP; Microsoft Edge Chromium (End Excluding: 116.0.1938.81); Microsoft Teams (End Excluding: 1.6.00.26474)
Published
12 September 2023
Attack vector
Network
Privileges required
None
User interaction
Required

Signal timeline

  1. Added to CISA KEV
  2. Latest EPSS score: 99.7%
  3. Signal calculated at 84

External references

Live public intelligence This assessment combines public-source evidence. Validate the affected product, version and exposure against your own environment before making a risk decision.