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GHSA-HVPM-HV6G-6M5C
Vulnerability from github – Published: 2026-03-04 18:31 – Updated: 2026-03-04 18:31
VLAI?
Details
A vulnerability in the HTML Cascading Style Sheets (CSS) module of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
This vulnerability is due to improper error handling when splitting UTF-8 strings. An attacker could exploit this vulnerability by submitting a crafted HTML file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the scanning process.
Severity ?
5.3 (Medium)
{
"affected": [],
"aliases": [
"CVE-2026-20031"
],
"database_specific": {
"cwe_ids": [
"CWE-248"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-04T18:16:16Z",
"severity": "MODERATE"
},
"details": "A vulnerability in the HTML Cascading Style Sheets (CSS) module of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\n\nThis vulnerability is due to improper error handling when splitting UTF-8 strings. An attacker could exploit this vulnerability by submitting a crafted HTML file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the scanning process.",
"id": "GHSA-hvpm-hv6g-6m5c",
"modified": "2026-03-04T18:31:54Z",
"published": "2026-03-04T18:31:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20031"
},
{
"type": "WEB",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-css-Fn4QSZ"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
}
]
}
CVE-2026-20031 (GCVE-0-2026-20031)
Vulnerability from cvelistv5 – Published: 2026-03-04 17:17 – Updated: 2026-03-05 15:52
VLAI?
EPSS
Title
ClamAV CSS Image Parsing Error Handling Denial of Service Vulnerability
Summary
A vulnerability in the HTML Cascading Style Sheets (CSS) module of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
This vulnerability is due to improper error handling when splitting UTF-8 strings. An attacker could exploit this vulnerability by submitting a crafted HTML file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the scanning process.
Severity ?
5.3 (Medium)
CWE
- CWE-248 - Uncaught Exception
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Cisco | Cisco Secure Endpoint |
Affected:
7.0.5
Affected: 6.2.19 Affected: 7.3.3 Affected: 7.2.13 Affected: 6.1.5 Affected: 6.3.1 Affected: 6.2.5 Affected: 7.3.5 Affected: 6.2.1 Affected: 7.2.7 Affected: 7.1.1 Affected: 6.3.5 Affected: 6.2.9 Affected: 7.3.1 Affected: 6.1.7 Affected: 7.2.11 Affected: 7.2.3 Affected: 7.1.5 Affected: 6.3.3 Affected: 7.3.9 Affected: 6.2.3 Affected: 6.1.9 Affected: 6.0.9 Affected: 7.2.5 Affected: 6.0.7 Affected: 6.3.7 Affected: 1.12.3 Affected: 1.8.0 Affected: 1.11.1 Affected: 1.12.4 Affected: 1.10.0 Affected: 1.12.0 Affected: 1.8.1 Affected: 1.10.1 Affected: 1.12.1 Affected: 1.12.6 Affected: 1.14.0 Affected: 1.10.2 Affected: 1.12.7 Affected: 1.12.2 Affected: 1.6.0 Affected: 1.9.0 Affected: 1.11.0 Affected: 1.7.0 Affected: 1.13.0 Affected: 1.8.4 Affected: 1.13.1 Affected: 1.9.1 Affected: 1.12.5 Affected: 1.13.2 Affected: 2.0.2 Affected: 1.1.0 Affected: 2.0.0 Affected: 2.0.1 Affected: 8.1.7.21512 Affected: 8.1.7 Affected: 8.1.5 Affected: 8.1.3.21242 Affected: 8.1.3 Affected: 8.1.5.21322 Affected: 8.1.7.21417 Affected: 2.1.0.14 Affected: 2.2.0 Affected: 2.3.0 Affected: 2.4.0 Affected: 2.5.0 Affected: 2.6.0 Affected: 2.7.0 Affected: 2.8.0 Affected: 2.9.0 Affected: 2.10.0 Affected: 2.10.1 Affected: 2.11.0 Affected: 1.14.1 Affected: 1.15.1 Affected: 1.15.2 Affected: 1.15.3 Affected: 1.15.4 Affected: 1.15.5 Affected: 1.15.6 Affected: 1.16.0 Affected: 1.16.1 Affected: 1.16.2 Affected: 1.16.3 Affected: 1.18.0 Affected: 1.18.1 Affected: 1.20.0 Affected: 1.21.0 Affected: 1.21.1 Affected: 1.21.2 Affected: 1.21.3 Affected: 1.22.0 Affected: 1.22.1 Affected: 1.22.2 Affected: 1.22.3 Affected: 1.22.4 Affected: 1.24.0 Affected: 1.24.1 Affected: 1.24.2 Affected: 1.24.3 Affected: 1.24.4 Affected: 1.26.0 Affected: 1.24.5 Affected: 1.26.1 Affected: 1.27.0 Affected: 1.15.0 Affected: 1.17.0 Affected: 1.17.1 Affected: 1.17.2 Affected: 1.19.0 Affected: 1.20.1 Affected: 1.20.2 Affected: 1.20.3 Affected: 1.20.4 Affected: 1.20.5 Affected: 1.20.6 Affected: 1.23.0 Affected: 1.23.1 Affected: 1.20.7 Affected: 1.20.8 Affected: 1.25.0 Affected: 1.25.1 Affected: 1.25.2 Affected: 1.27.1 Affected: 1.27.2 Affected: 7.3.13 Affected: 7.3.15 Affected: 7.4.1 Affected: 7.4.1.20425 Affected: 7.4.1.20439 Affected: 7.4.3 Affected: 7.4.3.20679 Affected: 7.4.5 Affected: 7.5.1.20813 Affected: 7.5.1.20833 Affected: 7.5.3 Affected: 7.5.5 Affected: 8.0.1.21160 Affected: 8.0.1.21164 Affected: 7.5.7 Affected: 7.5.9 Affected: 7.5.11 Affected: 8.1.7.21585 Affected: 7.5.13.21586 Affected: 7.5.13.21598 Affected: 8.2.1.21612 Affected: 8.2.1.21650 Affected: 7.5.15.21611 Affected: 7.5.17.21680 Affected: 8.2.3.30119 Affected: 8.2.4.30130 Affected: 8.4.0 Affected: 7.5.19 Affected: 8.4.1.30298 Affected: 8.4.2.30317 Affected: 8.4.1.30307 Affected: 7.5.20 Affected: 8.4.3 Affected: 8.4.4.30419 Affected: 8.4.4.30467 Affected: 7.5.21.21732 Affected: 8.4.5.30483 |
{
"containers": {
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{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-20031",
"options": [
{
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{
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{
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],
"role": "CISA Coordinator",
"timestamp": "2026-03-05T15:51:58.298217Z",
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"providerMetadata": {
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{
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{
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{
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"version": "1.12.3"
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{
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{
"status": "affected",
"version": "1.12.4"
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{
"status": "affected",
"version": "1.10.0"
},
{
"status": "affected",
"version": "1.12.0"
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{
"status": "affected",
"version": "1.8.1"
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{
"status": "affected",
"version": "1.10.1"
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{
"status": "affected",
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{
"status": "affected",
"version": "1.12.6"
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{
"status": "affected",
"version": "1.14.0"
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{
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{
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"version": "1.12.7"
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{
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"version": "1.12.2"
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{
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"version": "1.6.0"
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{
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"version": "1.9.0"
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{
"status": "affected",
"version": "1.11.0"
},
{
"status": "affected",
"version": "1.7.0"
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{
"status": "affected",
"version": "1.13.0"
},
{
"status": "affected",
"version": "1.8.4"
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{
"status": "affected",
"version": "1.13.1"
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{
"status": "affected",
"version": "1.9.1"
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{
"status": "affected",
"version": "1.12.5"
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{
"status": "affected",
"version": "1.13.2"
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{
"status": "affected",
"version": "2.0.2"
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{
"status": "affected",
"version": "1.1.0"
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{
"status": "affected",
"version": "2.0.0"
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{
"status": "affected",
"version": "2.0.1"
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{
"status": "affected",
"version": "8.1.7.21512"
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{
"status": "affected",
"version": "8.1.7"
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{
"status": "affected",
"version": "8.1.5"
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{
"status": "affected",
"version": "8.1.3.21242"
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{
"status": "affected",
"version": "8.1.3"
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{
"status": "affected",
"version": "8.1.5.21322"
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"version": "8.1.7.21417"
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{
"status": "affected",
"version": "2.1.0.14"
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{
"status": "affected",
"version": "2.2.0"
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{
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"version": "2.3.0"
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{
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"version": "2.4.0"
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{
"status": "affected",
"version": "2.5.0"
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{
"status": "affected",
"version": "2.6.0"
},
{
"status": "affected",
"version": "2.7.0"
},
{
"status": "affected",
"version": "2.8.0"
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{
"status": "affected",
"version": "2.9.0"
},
{
"status": "affected",
"version": "2.10.0"
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{
"status": "affected",
"version": "2.10.1"
},
{
"status": "affected",
"version": "2.11.0"
},
{
"status": "affected",
"version": "1.14.1"
},
{
"status": "affected",
"version": "1.15.1"
},
{
"status": "affected",
"version": "1.15.2"
},
{
"status": "affected",
"version": "1.15.3"
},
{
"status": "affected",
"version": "1.15.4"
},
{
"status": "affected",
"version": "1.15.5"
},
{
"status": "affected",
"version": "1.15.6"
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{
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"version": "1.16.0"
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{
"status": "affected",
"version": "1.16.1"
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"version": "1.16.2"
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"version": "1.16.3"
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{
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"version": "1.18.0"
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{
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"version": "1.18.1"
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"version": "1.20.0"
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{
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"version": "1.21.0"
},
{
"status": "affected",
"version": "1.21.1"
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"status": "affected",
"version": "1.21.2"
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{
"status": "affected",
"version": "1.21.3"
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{
"status": "affected",
"version": "1.22.0"
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{
"status": "affected",
"version": "1.22.1"
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{
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"version": "1.22.2"
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{
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"version": "1.22.3"
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{
"status": "affected",
"version": "1.22.4"
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{
"status": "affected",
"version": "1.24.0"
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"version": "1.24.1"
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"version": "1.24.2"
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"version": "1.24.3"
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"version": "1.24.4"
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{
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"version": "1.26.0"
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{
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"version": "1.24.5"
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"version": "1.19.0"
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"version": "1.20.1"
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"version": "1.20.2"
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"version": "1.20.3"
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"version": "1.20.4"
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{
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"version": "1.20.5"
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{
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"version": "1.20.6"
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{
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"version": "1.23.0"
},
{
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"version": "1.23.1"
},
{
"status": "affected",
"version": "1.20.7"
},
{
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"version": "1.20.8"
},
{
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"version": "1.25.0"
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"version": "7.4.3.20679"
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"version": "7.5.1.20833"
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"version": "7.5.5"
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{
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"version": "8.0.1.21160"
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{
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"version": "7.5.13.21598"
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{
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"version": "8.2.1.21612"
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{
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"version": "7.5.15.21611"
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{
"status": "affected",
"version": "7.5.17.21680"
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{
"status": "affected",
"version": "8.2.3.30119"
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{
"status": "affected",
"version": "8.2.4.30130"
},
{
"status": "affected",
"version": "8.4.0"
},
{
"status": "affected",
"version": "7.5.19"
},
{
"status": "affected",
"version": "8.4.1.30298"
},
{
"status": "affected",
"version": "8.4.2.30317"
},
{
"status": "affected",
"version": "8.4.1.30307"
},
{
"status": "affected",
"version": "7.5.20"
},
{
"status": "affected",
"version": "8.4.3"
},
{
"status": "affected",
"version": "8.4.4.30419"
},
{
"status": "affected",
"version": "8.4.4.30467"
},
{
"status": "affected",
"version": "7.5.21.21732"
},
{
"status": "affected",
"version": "8.4.5.30483"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the HTML Cascading Style Sheets (CSS) module of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to improper error handling when splitting UTF-8 strings. An attacker could exploit this vulnerability by submitting a crafted HTML file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the scanning process."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-248",
"description": "Uncaught Exception",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-04T17:44:55.869Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-clamav-css-Fn4QSZ",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-css-Fn4QSZ"
}
],
"source": {
"advisory": "cisco-sa-clamav-css-Fn4QSZ",
"defects": [
"CSCwq32780"
],
"discovery": "EXTERNAL"
},
"title": "ClamAV CSS Image Parsing Error Handling Denial of Service Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-20031",
"datePublished": "2026-03-04T17:17:33.372Z",
"dateReserved": "2025-10-08T11:59:15.353Z",
"dateUpdated": "2026-03-05T15:52:07.708Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
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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