CVE-2026-72702 (GCVE-0-2026-72702)
Vulnerability from cvelistv5 – Published: 2026-08-25 01:30 – Updated: 2026-08-25 01:30
VLAI
EPSS
VEX
Title
Grav CMS before 2.0.16 Origin Validation Bypass via Referer
Summary
Grav CMS before 2.0.16 contains an origin validation bypass in the Uri::referrer() and Pages::referrerRoute() methods, which validate the Referer header using an unanchored string prefix match (str_starts_with($referrer, $base)) with no trailing delimiter. An attacker who controls a domain that begins with the victim site's origin (e.g. https://example.com.attacker.tld) can send a request with such a Referer to be treated as same-origin, bypassing the Referer-based origin check.
Severity
5.4 (Medium)
CWE
- CWE-346 - Origin Validation Error
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/getgrav/grav/security/advisori… | vendor-advisory |
| https://www.vulncheck.com/advisories/grav-cms-bef… | third-party-advisory |
Impacted products
Date Public
2026-08-10 00:00
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"product": "grav",
"vendor": "getgrav",
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"status": "affected",
"version": "0",
"versionType": "semver"
},
{
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}
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}
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"metrics": [
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"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
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"attackVector": "NETWORK",
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
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"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
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"problemTypes": [
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"descriptions": [
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"cweId": "CWE-346",
"description": "Origin Validation Error",
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"providerMetadata": {
"dateUpdated": "2026-08-25T01:30:25.032Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
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"references": [
{
"name": "GitHub Security Advisory (GHSA-9ccq-2jfg-qw33)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/getgrav/grav/security/advisories/GHSA-9ccq-2jfg-qw33"
},
{
"name": "VulnCheck Advisory: Grav CMS before 2.0.16 Origin Validation Bypass via Referer",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/grav-cms-before-origin-validation-bypass-via-referer"
}
],
"title": "Grav CMS before 2.0.16 Origin Validation Bypass via Referer",
"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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"cveId": "CVE-2026-72702",
"datePublished": "2026-08-25T01:30:25.032Z",
"dateReserved": "2026-08-10T13:02:20.829Z",
"dateUpdated": "2026-08-25T01:30:25.032Z",
"state": "PUBLISHED"
},
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"dataVersion": "5.2",
"vulnerability-lookup:meta": {
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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