CVE-2026-34460 (GCVE-0-2026-34460)
Vulnerability from cvelistv5 – Published: 2026-06-02 15:29 – Updated: 2026-06-02 17:35
VLAI
EPSS
VEX
Title
NamelessMC: OAuth callback `state` is not validated, allowing login CSRF / session swapping
Summary
NamelessMC is website software for Minecraft servers. In versions 2.2.4 and prior, the OAuth callback handling does not validate the state parameter server-side before exchanging the authorization code. This allows an attacker to capture a valid OAuth callback URL for their own account and cause a victim's browser to navigate to it, resulting in the victim's session being authenticated as the attacker-linked account (OAuth login CSRF / session swapping). This is patched in version 2.2.5.
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-02 17:35 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/NamelessMC/Nameless/security/a… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| NamelessMC | Nameless |
Affected:
< 2.2.5
|
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-34460",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-02T17:35:06.384367Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-02T17:35:29.044Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/NamelessMC/Nameless/security/advisories/GHSA-pmpw-2xvh-5xj6"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Nameless",
"vendor": "NamelessMC",
"versions": [
{
"status": "affected",
"version": "\u003c 2.2.5"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "NamelessMC is website software for Minecraft servers. In versions 2.2.4 and prior, the OAuth callback handling does not validate the state parameter server-side before exchanging the authorization code. This allows an attacker to capture a valid OAuth callback URL for their own account and cause a victim\u0027s browser to navigate to it, resulting in the victim\u0027s session being authenticated as the attacker-linked account (OAuth login CSRF / session swapping). This is patched in version 2.2.5."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"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",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-302",
"description": "CWE-302: Authentication Bypass by Assumed-Immutable Data",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-346",
"description": "CWE-346: Origin Validation Error",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-352",
"description": "CWE-352: Cross-Site Request Forgery (CSRF)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-02T15:29:14.648Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/NamelessMC/Nameless/security/advisories/GHSA-pmpw-2xvh-5xj6",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/NamelessMC/Nameless/security/advisories/GHSA-pmpw-2xvh-5xj6"
}
],
"source": {
"advisory": "GHSA-pmpw-2xvh-5xj6",
"discovery": "UNKNOWN"
},
"title": "NamelessMC: OAuth callback `state` is not validated, allowing login CSRF / session swapping"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-34460",
"datePublished": "2026-06-02T15:29:14.648Z",
"dateReserved": "2026-03-27T18:18:14.896Z",
"dateUpdated": "2026-06-02T17:35:29.044Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-34460",
"date": "2026-11-10",
"epss": "0.00114",
"percentile": "0.01466"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "Nameless",
"vendor": "NamelessMC",
"versions": [
{
"status": "affected",
"version": "\u003c 2.2.5"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "NamelessMC is website software for Minecraft servers. In versions 2.2.4 and prior, the OAuth callback handling does not validate the state parameter server-side before exchanging the authorization code. This allows an attacker to capture a valid OAuth callback URL for their own account and cause a victim\u0027s browser to navigate to it, resulting in the victim\u0027s session being authenticated as the attacker-linked account (OAuth login CSRF / session swapping). This is patched in version 2.2.5."
},
{
"lang": "es",
"value": "NamelessMC es un software de sitio web para servidores de Minecraft. En las versiones 2.2.4 y anteriores, el manejo de la devoluci\u00f3n de llamada de OAuth no valida el par\u00e1metro state en el lado del servidor antes de intercambiar el c\u00f3digo de autorizaci\u00f3n. Esto permite a un atacante capturar una URL de devoluci\u00f3n de llamada de OAuth v\u00e1lida para su propia cuenta y hacer que el navegador de una v\u00edctima navegue a ella, lo que resulta en que la sesi\u00f3n de la v\u00edctima se autentique como la cuenta vinculada al atacante (CSRF de inicio de sesi\u00f3n de OAuth / intercambio de sesi\u00f3n). Esto est\u00e1 parcheado en la versi\u00f3n 2.2.5."
}
],
"id": "CVE-2026-34460",
"lastModified": "2026-07-22T19:10:00.120",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"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",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 2.5,
"source": "security-advisories@github.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-34460",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-02T17:35:06.384367Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-06-02T16:16:36.933",
"references": [
{
"source": "security-advisories@github.com",
"url": "https://github.com/NamelessMC/Nameless/security/advisories/GHSA-pmpw-2xvh-5xj6"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"url": "https://github.com/NamelessMC/Nameless/security/advisories/GHSA-pmpw-2xvh-5xj6"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-302"
},
{
"lang": "en",
"value": "CWE-346"
},
{
"lang": "en",
"value": "CWE-352"
}
],
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-06-05T19:38:49+00:00",
"cve": "CVE-2026-34460",
"id": "CVE-2026-34460",
"initial_release_date": "2026-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "NamelessMC: OAuth callback `state` is not validated, allowing login CSRF / session swapping",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34460.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-34460",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-02T17:35:06.384367Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-02T17:34:22.399Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/NamelessMC/Nameless/security/advisories/GHSA-pmpw-2xvh-5xj6"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Nameless",
"vendor": "NamelessMC",
"versions": [
{
"status": "affected",
"version": "\u003c 2.2.5"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "NamelessMC is website software for Minecraft servers. In versions 2.2.4 and prior, the OAuth callback handling does not validate the state parameter server-side before exchanging the authorization code. This allows an attacker to capture a valid OAuth callback URL for their own account and cause a victim\u0027s browser to navigate to it, resulting in the victim\u0027s session being authenticated as the attacker-linked account (OAuth login CSRF / session swapping). This is patched in version 2.2.5."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"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",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-302",
"description": "CWE-302: Authentication Bypass by Assumed-Immutable Data",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-346",
"description": "CWE-346: Origin Validation Error",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-352",
"description": "CWE-352: Cross-Site Request Forgery (CSRF)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-02T15:29:14.648Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/NamelessMC/Nameless/security/advisories/GHSA-pmpw-2xvh-5xj6",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/NamelessMC/Nameless/security/advisories/GHSA-pmpw-2xvh-5xj6"
}
],
"source": {
"advisory": "GHSA-pmpw-2xvh-5xj6",
"discovery": "UNKNOWN"
},
"title": "NamelessMC: OAuth callback `state` is not validated, allowing login CSRF / session swapping"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-34460",
"datePublished": "2026-06-02T15:29:14.648Z",
"dateReserved": "2026-03-27T18:18:14.896Z",
"dateUpdated": "2026-06-02T17:35:29.044Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
Loading timeline…
Loading…
Loading…
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.
Loading…
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.