CVE-2026-77850 (GCVE-0-2026-77850)
Vulnerability from cvelistv5 – Published: 2026-08-31 02:23 – Updated: 2026-08-31 16:05
VLAI
EPSS
VEX
Title
Stored XSS in AshAdmin relationship typeahead via unescaped label_field content
Summary
Stored Cross-site Scripting vulnerability in ash-project ash_admin executes attacker-supplied record content as script in an administrator's browser.
The relationship typeahead components AshAdmin.Components.Resource.RelationshipField and AshAdmin.Components.Resource.ManagedRelationshipSelectField highlight the matched search term by wrapping it in <b> tags and rendering the whole string with Phoenix.HTML.raw/1. The highlighted value is the destination record's label_field, ordinary database content that is often written by lower-privileged users. Because raw/1 disables output escaping for the entire string, a stored label such as <img src=x onerror=...> runs as JavaScript in the admin's session as soon as a matching record appears in the dropdown, giving the attacker the admin's privileges over everything AshAdmin exposes. The fix HTML-escapes the label before inserting the highlight markup.
This issue affects ash_admin: from 0.13.0 before 1.3.1.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 16:05 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ash-project/ash_admin/security… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-77850.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-77850 | related |
| https://github.com/ash-project/ash_admin/commit/0… | patch |
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| ash-project | ash_admin |
Affected:
0.13.0 , < 1.3.1
(semver)
cpe:2.3:a:ash-project:ash_admin:*:*:*:*:*:*:*:* |
||
| ash-project | ash_admin |
Affected:
eb940f4d7d857ca49368ae847f586d01c6f5ad35 , < 07289191ccdac27dd70ab7c6413ed057bc7fdade
(git)
cpe:2.3:a:ash-project:ash_admin:*:*:*:*:*:*:*:* |
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"value": "\u003cp\u003eStored Cross-site Scripting vulnerability in ash-project ash_admin executes attacker-supplied record content as script in an administrator\u0027s browser.\u003c/p\u003e\n\u003cp\u003eThe relationship typeahead components \u003ccode\u003eAshAdmin.Components.Resource.RelationshipField\u003c/code\u003e and \u003ccode\u003eAshAdmin.Components.Resource.ManagedRelationshipSelectField\u003c/code\u003e highlight the matched search term by wrapping it in \u003ccode\u003e\u0026lt;b\u0026gt;\u003c/code\u003e tags and rendering the whole string with \u003ccode\u003ePhoenix.HTML.raw/1\u003c/code\u003e. The highlighted value is the destination record\u0027s \u003ccode\u003elabel_field\u003c/code\u003e, ordinary database content that is often written by lower-privileged users. Because \u003ccode\u003eraw/1\u003c/code\u003e disables output escaping for the entire string, a stored label such as \u003ccode\u003e\u0026lt;img src=x onerror=...\u0026gt;\u003c/code\u003e runs as JavaScript in the admin\u0027s session as soon as a matching record appears in the dropdown, giving the attacker the admin\u0027s privileges over everything AshAdmin exposes. The fix HTML-escapes the label before inserting the highlight markup.\u003c/p\u003e\n\u003cp\u003eThis issue affects ash_admin: from 0.13.0 before 1.3.1.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "Stored Cross-site Scripting vulnerability in ash-project ash_admin executes attacker-supplied record content as script in an administrator\u0027s browser.\n\nThe relationship typeahead components `AshAdmin.Components.Resource.RelationshipField` and `AshAdmin.Components.Resource.ManagedRelationshipSelectField` highlight the matched search term by wrapping it in `\u003cb\u003e` tags and rendering the whole string with `Phoenix.HTML.raw/1`. The highlighted value is the destination record\u0027s `label_field`, ordinary database content that is often written by lower-privileged users. Because `raw/1` disables output escaping for the entire string, a stored label such as `\u003cimg src=x onerror=...\u003e` runs as JavaScript in the admin\u0027s session as soon as a matching record appears in the dropdown, giving the attacker the admin\u0027s privileges over everything AshAdmin exposes. The fix HTML-escapes the label before inserting the highlight markup.\n\nThis issue affects ash_admin: from 0.13.0 before 1.3.1."
}
],
"value": "Stored Cross-site Scripting vulnerability in ash-project ash_admin executes attacker-supplied record content as script in an administrator\u0027s browser.\n\nThe relationship typeahead components AshAdmin.Components.Resource.RelationshipField and AshAdmin.Components.Resource.ManagedRelationshipSelectField highlight the matched search term by wrapping it in \u003cb\u003e tags and rendering the whole string with Phoenix.HTML.raw/1. The highlighted value is the destination record\u0027s label_field, ordinary database content that is often written by lower-privileged users. Because raw/1 disables output escaping for the entire string, a stored label such as \u003cimg src=x onerror=...\u003e runs as JavaScript in the admin\u0027s session as soon as a matching record appears in the dropdown, giving the attacker the admin\u0027s privileges over everything AshAdmin exposes. The fix HTML-escapes the label before inserting the highlight markup.\n\nThis issue affects ash_admin: from 0.13.0 before 1.3.1."
}
],
"impacts": [
{
"capecId": "CAPEC-592",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-592 Stored XSS"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.4,
"baseSeverity": "HIGH",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "ACTIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-31T02:23:54.129Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
},
"references": [
{
"tags": [
"vendor-advisory",
"related"
],
"url": "https://github.com/ash-project/ash_admin/security/advisories/GHSA-m23x-576h-73w8"
},
{
"tags": [
"related"
],
"url": "https://cna.erlef.org/cves/CVE-2026-77850.html"
},
{
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-77850"
},
{
"tags": [
"patch"
],
"url": "https://github.com/ash-project/ash_admin/commit/07289191ccdac27dd70ab7c6413ed057bc7fdade"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Stored XSS in AshAdmin relationship typeahead via unescaped label_field content"
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-77850",
"datePublished": "2026-08-31T02:23:54.129Z",
"dateReserved": "2026-08-31T00:45:02.443Z",
"dateUpdated": "2026-08-31T16:05:15.631Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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