CVE-2023-4863 (GCVE-0-2023-4863)
Vulnerability from cvelistv5 – Published: 2023-09-12 14:24 – Updated: 2025-10-21 23:05Summary
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)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2023-11-28 05:00 UTC
CWE
- Heap buffer overflow
- CWE-787 - Out-of-bounds Write
Assigner
References
47 references
Impacted products
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 76c80909-1637-4aa6-be6d-eb69244d4e8b
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 | |
| 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
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 7ce24c30-87c7-4c5f-aef8-0aefe718d735
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 | |
| 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
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"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)\"}, {\"lang\": \"es\", \"value\": \"El desbordamiento del b\\u00fafer de memoria en libwebp en Google Chrome anterior a 116.0.5845.187 y libwebp 1.3.2 permit\\u00eda a un atacante remoto realizar una escritura en memoria fuera de los l\\u00edmites a trav\\u00e9s de una p\\u00e1gina HTML manipulada. (Severidad de seguridad de Chromium: cr\\u00edtica)\"}]",
"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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"cve": "CVE-2023-4863",
"id": "CVE-2023-4863",
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"product_status:fixed": "561",
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"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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"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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{\"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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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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