CVE-2026-104056 (GCVE-0-2026-104056)
Vulnerability from cvelistv5 – Published: 2026-10-01 18:03 – Updated: 2026-10-01 18:03
VLAI
EPSS
VEX
Title
CVE-2026-104056
Summary
Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL.
Severity
No CVSS data available.
CWE
Assigner
References
1 reference
{
"containers": {
"cna": {
"affected": [
{
"product": "Authlib",
"vendor": "Authlib",
"versions": [
{
"status": "affected",
"version": "1.7.2"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-345 Insufficient Verification of Data Authenticity",
"lang": "en"
}
]
},
{
"descriptions": [
{
"description": "CWE-346 Origin Validation Error",
"lang": "en"
}
]
},
{
"descriptions": [
{
"description": "CWE-829 Inclusion of Functionality from Untrusted Control Sphere",
"lang": "en"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-01T18:03:27.484Z",
"orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
"shortName": "certcc"
},
"references": [
{
"url": "https://uziii2208.github.io/post/cve-2026-104056/"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "CVE-2026-104056",
"x_generator": {
"engine": "VINCE 3.0.49",
"env": "prod",
"origin": "https://cveawg.mitre.org/api/cve/CVE-2026-104056"
}
}
},
"cveMetadata": {
"assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
"assignerShortName": "certcc",
"cveId": "CVE-2026-104056",
"datePublished": "2026-10-01T18:03:27.484Z",
"dateReserved": "2026-10-01T18:01:19.689Z",
"dateUpdated": "2026-10-01T18:03:27.484Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "Authlib",
"vendor": "Authlib",
"versions": [
{
"status": "affected",
"version": "1.7.2"
}
]
}
],
"source": "cret@cert.org"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL."
}
],
"id": "CVE-2026-104056",
"lastModified": "2026-10-01T20:37:42.787",
"metrics": {},
"published": "2026-10-01T19:17:19.033",
"references": [
{
"source": "cret@cert.org",
"url": "https://uziii2208.github.io/post/cve-2026-104056/"
}
],
"sourceIdentifier": "cret@cert.org",
"vulnStatus": "Awaiting Analysis"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-10-02T01:15:11+00:00",
"cve": "CVE-2026-104056",
"id": "CVE-2026-104056",
"initial_release_date": "2026-10-01T18:03:27.484000+00:00",
"product_status:known_affected": "11",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "authlib: authlib: Information disclosure via unvalidated discovery metadata",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-104056.json",
"version": "3"
}
}
}
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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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