Lychee: A single 383-byte PDF causes ~184 seconds of CPU consumption in the real processing path
Lychee is a free, open-source photo-management tool. Prior to 7.7.0, Lychee enables ImageMagick PDF support with Ghostscript but does not apply an effective pre-render limit to PDF page dimensions in ImagickHandler::loadPdf(). An authenticated user who can upload a small PDF with an oversized /MediaBox can cause Imagick::readImage() to consume substantial CPU before failing to produce an image. When QUEUE_CONNECTION selects synchronous processing the request can occupy a web worker, while the official asynchronous Docker configuration can clog the shared image-processing queue and delay other work. The advisory did not identify a Ghostscript sandbox escape. This issue is fixed in version 7.7.0.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-77467
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 17:26 UTC · Revision 1
Source evidence
Lychee: A single 383-byte PDF causes ~184 seconds of CPU consumption in the real processing path
core-osv · Original sourcePublished 15 Oct 2026, 16:34 UTC
Lychee is a free, open-source photo-management tool. Prior to 7.7.0, Lychee enables ImageMagick PDF support with Ghostscript but does not apply an effective pre-render limit to PDF page dimensions in ImagickHandler::loadPdf(). An authenticated user who can upload a small PDF with an oversized /MediaBox can cause Imagick::readImage() to consume substantial CPU before failing to produce an image. When QUEUE_CONNECTION selects synchronous processing the request can occupy a web worker, while the official asynchronous Docker configuration can clog the shared image-processing queue and delay other work. The advisory did not identify a Ghostscript sandbox escape. This issue is fixed in version 7.7.0.
osv:CVE-2026-77467
Complete source record
{
"id": "6729548dee36f4534b67fcd40fd54d5535e58dd30b1e396d406fc66cccf32f86",
"url": "https://osv.dev/vulnerability/CVE-2026-77467",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Lychee: A single 383-byte PDF causes ~184 seconds of CPU consumption in the real processing path",
"summary": "Lychee is a free, open-source photo-management tool. Prior to 7.7.0, Lychee enables ImageMagick PDF support with Ghostscript but does not apply an effective pre-render limit to PDF page dimensions in ImagickHandler::loadPdf(). An authenticated user who can upload a small PDF with an oversized /MediaBox can cause Imagick::readImage() to consume substantial CPU before failing to produce an image. When QUEUE_CONNECTION selects synchronous processing the request can occupy a web worker, while the official asynchronous Docker configuration can clog the shared image-processing queue and delay other work. The advisory did not identify a Ghostscript sandbox escape. This issue is fixed in version 7.7.0.",
"evidence": "osv:CVE-2026-77467",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-77467",
"aliases": [
"CVE-2026-77467",
"GHSA-6736-fhxv-3p79"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/lycheeorg/lychee",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "c6a4c15bf7460dd47db5a7dba953d1004e4db6d5"
},
{
"fixed": "1e92846af4c2d259a225cf4517de17efba04f945"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
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"introduced": "0"
},
{
"fixed": "7.7.0"
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],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "1e92846af4c2d259a225cf4517de17efba04f945"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
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"source": "REFERENCES_TAG",
"original_tag": "v7.7.0"
}
]
}
}
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77467.json"
}
}
],
"modified": "2026-10-28T02:30:30.816621439Z",
"provider": "osv",
"references": [
"https://github.com/LycheeOrg/Lychee/releases/tag/v7.7.0",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77467.json",
"https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-6736-fhxv-3p79",
"https://nvd.nist.gov/vuln/detail/CVE-2026-77467",
"https://github.com/LycheeOrg/Lychee/commit/1e92846af4c2d259a225cf4517de17efba04f945",
"https://github.com/LycheeOrg/Lychee/pull/4511"
],
"provider_metadata": {
"cwe_ids": [
"CWE-400",
"CWE-770"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77467.json"
}
},
"related_cves": [
{
"value": "CVE-2026-77467",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 497839,
"published_at": "2026-10-15T16:34:35.236+00:00"
}