High
cairosvg — security advisory
CairoSVG is an SVG converter based on Cairo, a 2D graphics library. Prior to 2.9.1, rendering an attacker-controlled SVG with a path containing many segments can cause quadratic CPU consumption in cairosvg/path.py. The path tokenizer repeatedly slices and rescans the remaining path data, while draw_markers drains node.vertices with node.vertices.pop(0), causing repeated linear-time work. The svg2png, svg2pdf, and svg2ps APIs reach these operations during ordinary rendering, allowing a sub-megabyte SVG to consume substantial CPU and deny service to a rendering application. This issue is fixed in version 2.9.1.
- Products
- cairosvg
- Affected versions
- 1.0.16-1, 1.0.17-1, 1.0.19-1, 1.0.20-1, 2.4.0-2, 2.4.2-1, 2.5.0-1.1, 2.5.2-1, 2.7.1-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-107378
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:00 UTC · Revision 1
Source evidence
CairoSVG is an SVG converter based on Cairo, a 2D graphics library. Prior to 2.9.1, rendering an attacker-controlled SVG with a path containing many segments can cause quadratic CPU consumption in cairosvg/path.py. The path tokenizer repeatedly slices and rescans the remaining path data, while draw_markers drains node.vertices with node.vertices.pop(0), causing repeated linear-time work. The svg2png, svg2pdf, and svg2ps APIs reach these operations during ordinary rendering, allowing a sub-megabyte SVG to consume substantial CPU and deny service to a rendering application. This issue is fixed in version 2.9.1.
osv:UBUNTU-CVE-2026-107378
cairosvg
Fixed versions: Not specified
cairosvg
Fixed versions: Not specified
cairosvg
Fixed versions: Not specified
cairosvg
Fixed versions: Not specified
cairosvg
Fixed versions: Not specified
Complete source record
{
"id": "5f46f7eb4ab52f4ad97da7c61ec42c741b806abc46afd7cd2f9c976198ab5404",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-107378",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-107378",
"summary": "CairoSVG is an SVG converter based on Cairo, a 2D graphics library. Prior to 2.9.1, rendering an attacker-controlled SVG with a path containing many segments can cause quadratic CPU consumption in cairosvg/path.py. The path tokenizer repeatedly slices and rescans the remaining path data, while draw_markers drains node.vertices with node.vertices.pop(0), causing repeated linear-time work. The svg2png, svg2pdf, and svg2ps APIs reach these operations during ordinary rendering, allowing a sub-megabyte SVG to consume substantial CPU and deny service to a rendering application. This issue is fixed in version 2.9.1.",
"evidence": "osv:UBUNTU-CVE-2026-107378",
"products": [
{
"name": {
"value": "cairosvg",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.0.16-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.17-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.19-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "cairosvg",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.0.20-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "cairosvg",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.4.0-2",
"evidence": "/affected/2/versions"
},
{
"value": "2.4.2-1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "cairosvg",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.5.0-1.1",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.2-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "cairosvg",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.7.1-1",
"evidence": "/affected/4/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-107378",
"aliases": [
"UBUNTU-CVE-2026-107378"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cairosvg",
"purl": "pkg:deb/ubuntu/cairosvg?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"1.0.16-1",
"1.0.17-1",
"1.0.19-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107378.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python-cairosvg",
"binary_version": "1.0.19-1"
},
{
"binary_name": "python3-cairosvg",
"binary_version": "1.0.19-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cairosvg",
"purl": "pkg:deb/ubuntu/cairosvg?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"1.0.20-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107378.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python-cairosvg",
"binary_version": "1.0.20-1"
},
{
"binary_name": "python3-cairosvg",
"binary_version": "1.0.20-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cairosvg",
"purl": "pkg:deb/ubuntu/cairosvg?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"2.4.0-2",
"2.4.2-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107378.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cairosvg",
"binary_version": "2.4.2-1"
},
{
"binary_name": "python3-cairosvg",
"binary_version": "2.4.2-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cairosvg",
"purl": "pkg:deb/ubuntu/cairosvg?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"2.5.0-1.1",
"2.5.2-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107378.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cairosvg",
"binary_version": "2.5.2-1"
},
{
"binary_name": "python3-cairosvg",
"binary_version": "2.5.2-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cairosvg",
"purl": "pkg:deb/ubuntu/cairosvg?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"2.7.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107378.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cairosvg",
"binary_version": "2.7.1-1"
},
{
"binary_name": "python3-cairosvg",
"binary_version": "2.7.1-1"
}
]
}
}
],
"modified": "2026-10-17T12:58:01.405773236Z",
"provider": "osv",
"upstream": [
"CVE-2026-107378"
],
"references": [
"https://ubuntu.com/security/CVE-2026-107378",
"https://www.cve.org/CVERecord?id=CVE-2026-107378",
"https://github.com/Kozea/CairoSVG/commit/9d63f049f9988d0ddda3eb94564ac3a50a286523",
"https://github.com/Kozea/CairoSVG/commit/a4d585eb374724b79676e9cceaa9e9a1a4358565",
"https://github.com/Kozea/CairoSVG/releases/tag/2.9.1",
"https://github.com/Kozea/CairoSVG/security/advisories/GHSA-c3jg-qh8m-j3h2"
]
},
"related_cves": [
{
"value": "CVE-2026-107378",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 357878,
"published_at": "2026-10-08T18:17:00+00:00"
}