HighFix available
webkit2gtk, wpewebkit — security advisory
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing maliciously crafted web content may lead to arbitrary code execution.
- Products
- webkit2gtk, wpewebkit
- Affected versions
- Not specified
- Fixed versions
- 2.34.4-1
- CVEs
- CVE-2021-30953
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 01:42 UTC · Revision 1
Source evidence
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing maliciously crafted web content may lead to arbitrary code execution.
osv:DEBIAN-CVE-2021-30953
webkit2gtk
Fixed versions: 2.34.4-1
webkit2gtk
Fixed versions: 2.34.4-1
webkit2gtk
Fixed versions: 2.34.4-1
wpewebkit
Fixed versions: 2.34.4-1
wpewebkit
Fixed versions: 2.34.4-1
wpewebkit
Fixed versions: 2.34.4-1
Complete source record
{
"id": "d125fc9a24ad766c9405a274a263674b4478c8250877fb60572b65d31fbf8f90",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2021-30953",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2021-30953",
"summary": "An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing maliciously crafted web content may lead to arbitrary code execution.",
"evidence": "osv:DEBIAN-CVE-2021-30953",
"products": [
{
"name": {
"value": "webkit2gtk",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
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}
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{
"name": {
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],
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{
"name": {
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"evidence": "/affected/3/ranges"
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],
"affected_versions": []
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{
"name": {
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"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
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},
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}
],
"affected_versions": []
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],
"severity": "high",
"structured": {
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"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
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"type": "ECOSYSTEM",
"events": [
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],
"package": {
"name": "webkit2gtk",
"purl": "pkg:deb/debian/webkit2gtk?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-30953.json"
},
"ecosystem_specific": {
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}
},
{
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"package": {
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"ecosystem": "Debian:13"
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"database_specific": {
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{
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],
"package": {
"name": "webkit2gtk",
"purl": "pkg:deb/debian/webkit2gtk?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-30953.json"
},
"ecosystem_specific": {
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},
{
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"package": {
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"purl": "pkg:deb/debian/wpewebkit?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-30953.json"
},
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}
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{
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],
"package": {
"name": "wpewebkit",
"purl": "pkg:deb/debian/wpewebkit?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-30953.json"
},
"ecosystem_specific": {
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}
},
{
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{
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],
"package": {
"name": "wpewebkit",
"purl": "pkg:deb/debian/wpewebkit?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-30953.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-23T18:04:49.988363635Z",
"provider": "osv",
"upstream": [
"CVE-2021-30953"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2021-30953"
]
},
"related_cves": [
{
"value": "CVE-2021-30953",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 424034,
"published_at": "2021-08-24T19:15:21.817+00:00"
}