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ExploitedIn CISA KEVFix available

CVE-2023-4863

Exploitation confirmed. First attested on 2023-09-13 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2023-09-12
  • Fixed in27.0.0-beta.2 · 26.2.1 · 25.8.1 · 24.8.3 · 22.3.24
  • WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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)

Timeline

dates in UTC
  1. 2023-09-1215:15CVE publishedNVD
  2. 2023-09-13Added to the CISA KEV catalogCISA KEV
  3. 2023-09-13Listed as exploited by GCVEGCVE
  4. 2023-09-13Exploitation first reportedCISA KEV
  5. 2023-11-2805:00SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-4863?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-4863?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV · NVD
electron
BranchAffectedFixed in
27.0≥ 27.0.0-beta.1, < 27.0.0-beta.227.0.0-beta.2
26.x≥ 26.0.0, < 26.2.126.2.1
25.x≥ 25.0.0, < 25.8.125.8.1
24.x≥ 24.0.0, < 24.8.324.8.3
22.x≥ 22.0.0, < 22.3.2422.3.24
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
11.0= 11.0no fix published
12.0= 12.0no fix published
Fedoraproject fedora
BranchAffectedFixed in
37.x= 37no fix published
38.x= 38no fix published
39.x= 39no fix published

22 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA2 products

As Chrome, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Google Chrome
    Affected
    • ≥ 116.0.5845.187, < 116.0.5845.187fixed in 116.0.5845.187custom
  • Google libwebp
    Affected
    • ≥ 1.3.2, < 1.3.2fixed in 1.3.2custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2024-01-07

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • aflopenSUSE:Tumbleweedall versions · fixed in 5.00c-1.1
  • chromiumSUSE:Package Hub 15 SP5all versions · fixed in 116.0.5845.187-bp155.2.31.1
  • chromiumSUSE:Package Hub 15 SP5all versions · fixed in 116.0.5845.187-bp155.2.34.1
  • chromiumSUSE:Package Hub 15 SP4all versions · fixed in 116.0.5845.187-bp155.2.31.1
  • chromiumSUSE:Package Hub 15 SP4all versions · fixed in 116.0.5845.187-bp155.2.34.1
  • chromiumopenSUSE:Tumbleweedall versions · fixed in 116.0.5845.179-1.1
  • chromiumopenSUSE:Tumbleweedall versions · fixed in 116.0.5845.187-1.1
  • chromiumopenSUSE:Leap 15.5all versions · fixed in 116.0.5845.187-bp155.2.31.1

243 more package ranges on OSV.dev

Vendor advisories

  • CVE-2023-4863 Red Hat Product Security561 products fixed · 2 known affected

    libwebp: Heap buffer overflow in WebP Codec

    firefox as a component of Red Hat Enterprise Linux 6 · firefox.src as a component of Red Hat Enterprise Linux 6

  • ICSA-26-300-02 CISA4 known affected

    Mitsubishi Electric GENESIS, GENESIS64, ICONICS Suite, Hyper Historian, AnalytiX, MobileHMI, IoTWorX, MC Works64, GENESIS32 and BizViz

    Mitsubishi Electric GENESIS64: >=10.97|<=10.97.2 · Mitsubishi Electric ICONICS Suite: >=10.97|<=10.97.2 · Mitsubishi Electric Iconics Digital Solutions GENESIS64: >=10.97|<=10.97.2 · +1 more

  • ICSA-23-320-11 CISA4 known affected

    Siemens Mendix Studio Pro

    Mendix Studio Pro 10 · Mendix Studio Pro 7 · Mendix Studio Pro 8 · +1 more

  • SSA-268517 Siemens ProductCERT4 known affected

    SSA-268517: Code Execution Vulnerability (libwebp CVE-2023-4863) in Mendix Studio Pro

    Mendix Studio Pro 10 · Mendix Studio Pro 7 · Mendix Studio Pro 8 · +1 more

  • RHBA-2023:6004 Red Hat Product Security1 product fixed

    Red Hat Bug Fix Advisory: Updated rhel9/thunderbird-flatpak container image

  • RHBA-2023:5988 Red Hat Product Security1 product fixed

    Red Hat Bug Fix Advisory: Updated rhel9/firefox-flatpak container image

23 more advisories

Full record on NVD

Fix

  1. Update electron to 27.0.0-beta.2 · 26.2.1 · 25.8.1 · 24.8.3 · 22.3.24
  2. CISA’s required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.due 2023-10-04
  3. Vendor fix CISA ICSA-26-300-02 · 2 productsMitsubishi Electric is releasing fixed version 10.97.3 or later for GENESIS64 and ICONICS Suite. Please download the fixed version from the link below and install it: "https://iconicsinc.my.site.com/community/s/resource-center/product-downloads". (Note: GENESIS64 is included in the ICONICS Suite in…
  4. Vendor fix CISA ICSA-26-300-02 · 2 productsMitsubishi Electric Iconics Digital Solutions is releasing fixed version 10.97.3 or later for GENESIS64 and ICONICS Suite. Please download the fixed version from the link below and install it: "https://iconicsinc.my.site.com/community/s/resource-center/product-downloads". Note: GENESIS64 is include…
  5. Vendor fix CISA ICSA-23-320-11 · 1 productUpdate to V10.3.1 or later version
  6. Vendor fix CISA ICSA-23-320-11 · 1 productUpdate to V7.23.37 or later version
  7. Vendor fix CISA ICSA-23-320-11 · 1 productUpdate to V8.18.27 or later version
  8. Vendor fix CISA ICSA-23-320-11 · 1 productUpdate to V9.24.0 or later version

Advisories and patches

Detection

read 2026-11-03 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
14 repositories, unverifiedmistymntncop/CVE-2023-4863bbaranoff/CVE-2023-4863talbeerysec/BAD-WEBP-CVE-2023-4863OITApps/Find-VulnerableElectronVersionGTGalaxi/ElectronVulnerableVersion
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2023-09-13
Patch Due Date
2023-10-04
Ransomware Use
Unknown
Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2023-09-12
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-j7hp-h8jx-5ppr

Frequently asked questions

What is CVE-2023-4863?

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)

Is CVE-2023-4863 actively exploited?

Yes. CVE-2023-4863 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2023-10-04.

What is the CVSS score for CVE-2023-4863?

CVE-2023-4863 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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