CVE-2023-4863 (GCVE-0-2023-4863)

Vulnerability from cvelistv5 – Published: 2023-09-12 14:24 – Updated: 2025-10-21 23:05
VLAI CISA KEVIntel
Summary
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)
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • Heap buffer overflow
  • CWE-787 - Out-of-bounds Write
Assigner
References
URL Tags
https://chromereleases.googleblog.com/2023/09/sta…
https://crbug.com/1479274
https://en.bandisoft.com/honeyview/history/
https://stackdiary.com/critical-vulnerability-in-…
https://www.mozilla.org/en-US/security/advisories…
https://github.com/webmproject/libwebp/commit/902…
https://msrc.microsoft.com/update-guide/vulnerabi…
https://security-tracker.debian.org/tracker/CVE-2…
https://bugzilla.suse.com/show_bug.cgi?id=1215231
https://news.ycombinator.com/item?id=37478403
https://www.bleepingcomputer.com/news/google/goog…
https://www.debian.org/security/2023/dsa-5496
https://www.debian.org/security/2023/dsa-5497
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.debian.org/debian-lts-announce/2023…
https://lists.fedoraproject.org/archives/list/pac…
https://www.debian.org/security/2023/dsa-5498
https://security.gentoo.org/glsa/202309-05
https://lists.debian.org/debian-lts-announce/2023…
https://lists.fedoraproject.org/archives/list/pac…
https://adamcaudill.com/2023/09/14/whose-cve-is-i…
https://github.com/webmproject/libwebp/releases/t…
https://lists.debian.org/debian-lts-announce/2023…
https://lists.fedoraproject.org/archives/list/pac…
http://www.openwall.com/lists/oss-security/2023/09/21/4
https://blog.isosceles.com/the-webp-0day/
http://www.openwall.com/lists/oss-security/2023/09/22/1
http://www.openwall.com/lists/oss-security/2023/09/22/3
http://www.openwall.com/lists/oss-security/2023/09/22/4
http://www.openwall.com/lists/oss-security/2023/09/22/5
http://www.openwall.com/lists/oss-security/2023/09/22/8
http://www.openwall.com/lists/oss-security/2023/09/22/7
http://www.openwall.com/lists/oss-security/2023/09/22/6
http://www.openwall.com/lists/oss-security/2023/09/26/1
http://www.openwall.com/lists/oss-security/2023/09/26/7
http://www.openwall.com/lists/oss-security/2023/09/28/1
http://www.openwall.com/lists/oss-security/2023/09/28/2
http://www.openwall.com/lists/oss-security/2023/09/28/4
https://security.netapp.com/advisory/ntap-2023092…
https://lists.fedoraproject.org/archives/list/pac…
https://sethmlarson.dev/security-developer-in-res…
https://www.bentley.com/advisories/be-2023-0001/
https://security.gentoo.org/glsa/202401-10
https://www.vicarius.io/vsociety/posts/zero-day-w…
https://www.cisa.gov/known-exploited-vulnerabilit… government-resource
Impacted products
Vendor Product Version
Google Chrome Affected: 116.0.5845.187 , < 116.0.5845.187 (custom)
Create a notification for this product.
Google libwebp Affected: 1.3.2 , < 1.3.2 (custom)
Create a notification for this product.
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 76c80909-1637-4aa6-be6d-eb69244d4e8b

Vulnerability ID: CVE-2023-4863

Status: Confirmed

Status Updated: 2023-09-13 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2023-09-13
Asserted: 2023-09-13
Scope
Notes: KEV entry: Google Chromium WebP Heap-Based Buffer Overflow Vulnerability | Affected: Google / Chromium WebP | Description: Google Chromium WebP contains a heap-based buffer overflow vulnerability that allows a remote attacker to perform an out-of-bounds memory write via a crafted HTML page. This vulnerability can affect applications that use the WebP Codec. | Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. | Due date: 2023-10-04 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_11.html?m=1; https://nvd.nist.gov/vuln/detail/CVE-2023-4863
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-787
Feed CISA Known Exploited Vulnerabilities Catalog
Product Chromium WebP
Due Date 2023-10-04
Date Added 2023-09-13
Vendorproject Google
Vulnerabilityname Google Chromium WebP Heap-Based Buffer Overflow Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 12:26 UTC | Updated: 2026-02-06 07:17 UTC
KEVIntel
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 7ce24c30-87c7-4c5f-aef8-0aefe718d735

Vulnerability ID: CVE-2023-4863

Status: Confirmed

Status Updated: 2023-09-13 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2023-09-13
Asserted: 2023-09-13
Scope
Notes: KEVIntel entry: 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... | Affected: Google / Chrome, libwebp | CVSS: 8.8 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title 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...
Vendor Google
Product Chrome, libwebp
Added Date 2023-09-13T00:00:00.000Z
Cvss Score 8.8
Epss Score None
Cvss Severity HIGH
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False
References
Created: 2026-06-23 14:05 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

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    "assignerOrgId": "ebfee0ef-53dd-4cf3-9e2a-08a5bd7a7e28",
    "assignerShortName": "Chrome",
    "cveId": "CVE-2023-4863",
    "datePublished": "2023-09-12T14:24:59.275Z",
    "dateReserved": "2023-09-09T01:02:58.312Z",
    "dateUpdated": "2025-10-21T23:05:38.429Z",
    "state": "PUBLISHED"
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      "dateAdded": "2023-09-13",
      "dueDate": "2023-10-04",
      "knownRansomwareCampaignUse": "Unknown",
      "notes": "https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_11.html?m=1; https://nvd.nist.gov/vuln/detail/CVE-2023-4863",
      "product": "Chromium WebP",
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      "shortDescription": "Google Chromium WebP contains a heap-based buffer overflow vulnerability that allows a remote attacker to perform an out-of-bounds memory write via a crafted HTML page. This vulnerability can affect applications that use the WebP Codec.",
      "vendorProject": "Google",
      "vulnerabilityName": "Google Chromium WebP Heap-Based Buffer Overflow Vulnerability"
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      "cisaExploitAdd": "2023-09-13",
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      "cisaVulnerabilityName": "Google Chromium WebP Heap-Based Buffer Overflow Vulnerability",
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      "id": "CVE-2023-4863",
      "lastModified": "2024-12-20T19:00:21.050",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H\", \"baseScore\": 8.8, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"REQUIRED\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 2.8, \"impactScore\": 5.9}]}",
      "published": "2023-09-12T15:15:24.327",
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      "current_release_date": "2025-11-21T13:40:23+00:00",
      "cve": "CVE-2023-4863",
      "id": "CVE-2023-4863",
      "initial_release_date": "2023-09-11T00:00:00+00:00",
      "product_status:fixed": "561",
      "product_status:known_affected": "2",
      "product_status:known_not_affected": "5",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "libwebp: Heap buffer overflow in WebP Codec",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-4863.json",
      "version": "3"
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      "current_release_date": "2026-07-23T02:22:48Z",
      "cve": "CVE-2023-4863",
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      "initial_release_date": "2023-09-13T02:50:04Z",
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      "product_status:recommended": "714",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-4863",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-4863.json",
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\"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FYYKLG6CRGEDTNRBSU26EEWAO6D6U645/\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PYZV7TMKF4QHZ54SFJX54BDN52VHGGCX/\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2023/09/msg00015.html\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WHOLML7N2G5KCAZXFWC5IDFFHSQS5SDB/\"}, {\"url\": \"https://www.debian.org/security/2023/dsa-5498\"}, {\"url\": \"https://security.gentoo.org/glsa/202309-05\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2023/09/msg00016.html\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6T655QF7CQ3DYAMPFV7IECQYGDEUIVVT/\"}, {\"url\": \"https://adamcaudill.com/2023/09/14/whose-cve-is-it-anyway/\"}, {\"url\": \"https://github.com/webmproject/libwebp/releases/tag/v1.3.2\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2023/09/msg00017.html\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KUQ7CTX3W372X3UY56VVNAHCH6H2F4X3/\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/09/21/4\"}, {\"url\": \"https://blog.isosceles.com/the-webp-0day/\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/09/22/1\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/09/22/3\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/09/22/4\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/09/22/5\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/09/22/8\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/09/22/7\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/09/22/6\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/09/26/1\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/09/26/7\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/09/28/1\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/09/28/2\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2023/09/28/4\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20230929-0011/\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WTRUIS3564P7ZLM2S2IH4Y4KZ327LI4I/\"}, {\"url\": \"https://sethmlarson.dev/security-developer-in-residence-weekly-report-16\"}, {\"url\": \"https://www.bentley.com/advisories/be-2023-0001/\"}, {\"url\": \"https://security.gentoo.org/glsa/202401-10\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"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)\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"Heap buffer overflow\"}]}], \"providerMetadata\": {\"orgId\": \"ebfee0ef-53dd-4cf3-9e2a-08a5bd7a7e28\", \"shortName\": \"Chrome\", \"dateUpdated\": \"2024-01-07T11:07:27.027Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-4863\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-21T23:05:38.429Z\", \"dateReserved\": \"2023-09-09T01:02:58.312Z\", \"assignerOrgId\": \"ebfee0ef-53dd-4cf3-9e2a-08a5bd7a7e28\", \"datePublished\": \"2023-09-12T14:24:59.275Z\", \"assignerShortName\": \"Chrome\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.