High
Thumbor has Regex Denial of Service (ReDoS) in `convolution` filter
Type: advisorySources: OSV
Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the convolution filter regular expression performs exponential backtracking on crafted repeated numeric input, allowing a URL request to exhaust processing time. This issue is fixed in 7.8.0.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-53504
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 14:10 UTC · Revision 1
Source evidence
Thumbor has Regex Denial of Service (ReDoS) in `convolution` filter
core-osv · Original sourcePublished 31 Jul 2026, 18:57 UTC
Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the convolution filter regular expression performs exponential backtracking on crafted repeated numeric input, allowing a URL request to exhaust processing time. This issue is fixed in 7.8.0.
osv:CVE-2026-53504
Complete source record
{
"id": "482aeccfba2a0bfb9990eafe947ae9c0e34fcb56331fc27d26e40b95bea5f03d",
"url": "https://osv.dev/vulnerability/CVE-2026-53504",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Thumbor has Regex Denial of Service (ReDoS) in `convolution` filter",
"summary": "Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the convolution filter regular expression performs exponential backtracking on crafted repeated numeric input, allowing a URL request to exhaust processing time. This issue is fixed in 7.8.0.",
"evidence": "osv:CVE-2026-53504",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-53504",
"aliases": [
"CVE-2026-53504",
"GHSA-5vjc-7cxw-4w6j",
"PYSEC-2026-3616"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
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"type": "GIT",
"events": [
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"introduced": "0"
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{
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{
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}
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{
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"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
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{
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53504.json"
}
}
],
"modified": "2026-10-28T02:30:29.307815990Z",
"provider": "osv",
"references": [
"https://github.com/thumbor/thumbor/releases/tag/7.8.0",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53504.json",
"https://github.com/thumbor/thumbor/security/advisories/GHSA-5vjc-7cxw-4w6j",
"https://nvd.nist.gov/vuln/detail/CVE-2026-53504",
"https://github.com/thumbor/thumbor/commit/3f38fe1610d20168e91f76d432212de30727eb2e"
],
"provider_metadata": {
"cwe_ids": [
"CWE-400"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53504.json"
}
},
"related_cves": [
{
"value": "CVE-2026-53504",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 496242,
"published_at": "2026-07-31T18:57:19.257+00:00"
}