CVE-2026-55805 (GCVE-0-2026-55805)
Vulnerability from cvelistv5 – Published: 2026-08-25 22:22 – Updated: 2026-08-25 22:22
VLAI
EPSS
VEX
Title
Drupal core - Moderately critical - Cross-site scripting - SA-CORE-2026-012
Summary
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Drupal core allows Stored XSS. This issue affects Drupal core versions: from 0.0.0 to 10.6.13, from 11.3.0 to 11.3.14, from 11.4.0 to 11.4.4, from 0.0.0 to 11.0.*, from 0.0.0 to 11.1.*, from 0.0.0 to 11.2.*.
Severity
No CVSS data available.
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting")
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Drupal | Drupal core |
Affected:
0.0.0 , < 10.6.13
(semver)
Affected: 11.3.0 , < 11.3.14 (semver) Affected: 11.4.0 , < 11.4.4 (semver) Affected: 0.0.0 , < 11.0.* (semver) Affected: 0.0.0 , < 11.1.* (semver) Affected: 0.0.0 , < 11.2.* (semver) |
guessed |
Date Public
2026-07-15 19:52
{
"containers": {
"cna": {
"affected": [
{
"collectionURL": "https://www.drupal.org/project/drupal",
"product": "Drupal core",
"repo": "https://git.drupalcode.org/project/drupal",
"vendor": "Drupal",
"versions": [
{
"lessThan": "10.6.13",
"status": "affected",
"version": "0.0.0",
"versionType": "semver"
},
{
"lessThan": "11.3.14",
"status": "affected",
"version": "11.3.0",
"versionType": "semver"
},
{
"lessThan": "11.4.4",
"status": "affected",
"version": "11.4.0",
"versionType": "semver"
},
{
"lessThan": "11.0.*",
"status": "affected",
"version": "0.0.0",
"versionType": "semver"
},
{
"lessThan": "11.1.*",
"status": "affected",
"version": "0.0.0",
"versionType": "semver"
},
{
"lessThan": "11.2.*",
"status": "affected",
"version": "0.0.0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "haii haii (hai27ii2o)"
},
{
"lang": "en",
"type": "remediation developer",
"value": "danielveza"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Lee Rowlands (larowlan)"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Mingsong (mingsong)"
},
{
"lang": "en",
"type": "remediation developer",
"value": "James Gilliland (neclimdul)"
},
{
"lang": "en",
"type": "coordinator",
"value": "Greg Knaddison (greggles)"
},
{
"lang": "en",
"type": "coordinator",
"value": "Lee Rowlands (larowlan)"
},
{
"lang": "en",
"type": "coordinator",
"value": "Dave Long (longwave)"
},
{
"lang": "en",
"type": "coordinator",
"value": "Jess (xjm)"
}
],
"datePublic": "2026-07-15T19:52:26.000Z",
"descriptions": [
{
"lang": "en",
"value": "Improper Neutralization of Input During Web Page Generation (\"Cross-site Scripting\") vulnerability in Drupal Drupal core allows Stored XSS. This issue affects Drupal core versions: from 0.0.0 to 10.6.13, from 11.3.0 to 11.3.14, from 11.4.0 to 11.4.4, from 0.0.0 to 11.0.*, from 0.0.0 to 11.1.*, from 0.0.0 to 11.2.*."
}
],
"impacts": [
{
"capecId": "CAPEC-592",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-592 Stored XSS"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\"Cross-site Scripting\")",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-25T22:22:20.763Z",
"orgId": "2c85b837-eb8b-40ed-9d74-228c62987387",
"shortName": "drupal"
},
"references": [
{
"url": "https://www.drupal.org/sa-core-2026-012"
}
],
"title": "Drupal core - Moderately critical - Cross-site scripting - SA-CORE-2026-012"
}
},
"cveMetadata": {
"assignerOrgId": "2c85b837-eb8b-40ed-9d74-228c62987387",
"assignerShortName": "drupal",
"cveId": "CVE-2026-55805",
"datePublished": "2026-08-25T22:22:20.763Z",
"dateReserved": "2026-06-17T14:59:52.673Z",
"dateUpdated": "2026-08-25T22:22:20.763Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-55805\",\"sourceIdentifier\":\"mlhess@drupal.org\",\"published\":\"2026-08-25T23:17:19.740\",\"lastModified\":\"2026-08-25T23:17:19.740\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Improper Neutralization of Input During Web Page Generation (\\\"Cross-site Scripting\\\") vulnerability in Drupal Drupal core allows Stored XSS. This issue affects Drupal core versions: from 0.0.0 to 10.6.13, from 11.3.0 to 11.3.14, from 11.4.0 to 11.4.4, from 0.0.0 to 11.0.*, from 0.0.0 to 11.1.*, from 0.0.0 to 11.2.*.\"}],\"affected\":[{\"source\":\"mlhess@drupal.org\",\"affectedData\":[{\"vendor\":\"Drupal\",\"product\":\"Drupal core\",\"collectionURL\":\"https://www.drupal.org/project/drupal\",\"repo\":\"https://git.drupalcode.org/project/drupal\",\"versions\":[{\"version\":\"0.0.0\",\"lessThan\":\"10.6.13\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"11.3.0\",\"lessThan\":\"11.3.14\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"11.4.0\",\"lessThan\":\"11.4.4\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0.0.0\",\"lessThan\":\"11.0.*\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0.0.0\",\"lessThan\":\"11.1.*\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"0.0.0\",\"lessThan\":\"11.2.*\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{},\"weaknesses\":[{\"source\":\"mlhess@drupal.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"references\":[{\"url\":\"https://www.drupal.org/sa-core-2026-012\",\"source\":\"mlhess@drupal.org\"}]}}"
}
}
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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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