CVE-2026-41839 (GCVE-0-2026-41839)
Vulnerability from cvelistv5 – Published: 2026-06-09 03:49 – Updated: 2026-06-23 20:41
VLAI
EPSS
VEX
Title
Spring Framework Escalation via Session Fixation in WebFlux
Summary
A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user.
Affected versions:
Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.
Severity
4.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-09 13:30 UTC
CWE
- CWE-384 - Session Fixation
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Spring | Spring Framework |
Affected:
7.0.0 , < 7.0.7.1
(custom)
Affected: 6.2.0 , < 6.2.18.1 (custom) Affected: 6.1.0 , < 6.1.28 (custom) Affected: 5.3.0 , < 5.3.49 (custom) |
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-41839",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-09T13:30:25.839375Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-09T13:30:34.473Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Spring Framework",
"vendor": "Spring",
"versions": [
{
"lessThan": "7.0.7.1",
"status": "affected",
"version": "7.0.0",
"versionType": "custom"
},
{
"lessThan": "6.2.18.1",
"status": "affected",
"version": "6.2.0",
"versionType": "custom"
},
{
"lessThan": "6.1.28",
"status": "affected",
"version": "6.1.0",
"versionType": "custom"
},
{
"lessThan": "5.3.49",
"status": "affected",
"version": "5.3.0",
"versionType": "custom"
}
]
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user.\n\nAffected versions:\nSpring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48."
}
],
"value": "A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user.\n\nAffected versions:\nSpring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "A WebFlux application with a compromised subdomain is vulnerable to a session fixation escalation attack that allows an attacker to exchange a known session ID for that of an authenticated user."
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.2,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-384",
"description": "CWE-384: Session Fixation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-23T20:41:11.906Z",
"orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
"shortName": "vmware"
},
"references": [
{
"url": "https://spring.io/security/cve-2026-41839"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Spring Framework Escalation via Session Fixation in WebFlux",
"x_generator": {
"engine": "Vulnogram 1.0.1"
}
}
},
"cveMetadata": {
"assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
"assignerShortName": "vmware",
"cveId": "CVE-2026-41839",
"datePublished": "2026-06-09T03:49:52.381Z",
"dateReserved": "2026-04-22T06:22:01.123Z",
"dateUpdated": "2026-06-23T20:41:11.906Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-41839",
"date": "2026-10-01",
"epss": "0.00213",
"percentile": "0.1045"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Spring Framework",
"vendor": "Spring",
"versions": [
{
"lessThan": "7.0.7.1",
"status": "affected",
"version": "7.0.0",
"versionType": "custom"
},
{
"lessThan": "6.2.18.1",
"status": "affected",
"version": "6.2.0",
"versionType": "custom"
},
{
"lessThan": "6.1.28",
"status": "affected",
"version": "6.1.0",
"versionType": "custom"
},
{
"lessThan": "5.3.49",
"status": "affected",
"version": "5.3.0",
"versionType": "custom"
}
]
}
],
"source": "security@vmware.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*",
"matchCriteriaId": "56B8E43A-21E9-42F3-B714-6D81E532490C",
"versionEndExcluding": "5.3.49",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*",
"matchCriteriaId": "CE392CE7-5DA3-4DBE-B22C-27781E204B7E",
"versionEndExcluding": "6.1.28",
"versionStartIncluding": "6.1.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*",
"matchCriteriaId": "4C369542-3C65-45B4-B70A-A406BA063629",
"versionEndExcluding": "6.2.19",
"versionStartIncluding": "6.2.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*",
"matchCriteriaId": "F8552E92-04FB-4262-81B0-ABE727526373",
"versionEndExcluding": "7.0.8",
"versionStartIncluding": "7.0.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user.\n\nAffected versions:\nSpring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48."
},
{
"lang": "es",
"value": "Una aplicaci\u00f3n WebFlux con un subdominio comprometido (por ejemplo, comprometido mediante cross-site scripting (XSS)) es vulnerable a un ataque de escalada que intercambia un ID de sesi\u00f3n conocido por el de un usuario autenticado.\n\nVersiones afectadas:\nSpring Framework 7.0.0 hasta 7.0.7; 6.2.0 hasta 6.2.18; 6.1.0 hasta 6.1.27; 5.3.0 hasta 5.3.48."
}
],
"id": "CVE-2026-41839",
"lastModified": "2026-07-23T08:10:00.137",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.2,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.6,
"impactScore": 2.5,
"source": "security@vmware.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-41839",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-09T13:30:25.839375Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-06-09T05:16:35.850",
"references": [
{
"source": "security@vmware.com",
"tags": [
"Vendor Advisory"
],
"url": "https://spring.io/security/cve-2026-41839"
}
],
"sourceIdentifier": "security@vmware.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-384"
}
],
"source": "security@vmware.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-07-17T13:20:15+00:00",
"cve": "CVE-2026-41839",
"id": "CVE-2026-41839",
"initial_release_date": "2026-06-09T03:49:52.381000+00:00",
"product_status:known_affected": "2",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "spring-framework: Spring Framework: Privilege escalation via session ID exchange in WebFlux applications",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41839.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-41839",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-09T13:30:25.839375Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-09T13:30:31.330Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Spring Framework",
"vendor": "Spring",
"versions": [
{
"lessThan": "7.0.7.1",
"status": "affected",
"version": "7.0.0",
"versionType": "custom"
},
{
"lessThan": "6.2.18.1",
"status": "affected",
"version": "6.2.0",
"versionType": "custom"
},
{
"lessThan": "6.1.28",
"status": "affected",
"version": "6.1.0",
"versionType": "custom"
},
{
"lessThan": "5.3.49",
"status": "affected",
"version": "5.3.0",
"versionType": "custom"
}
]
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user.\n\nAffected versions:\nSpring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48."
}
],
"value": "A WebFlux application with a compromised subdomain (for example, compromised via cross-site scripting (XSS)) is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user.\n\nAffected versions:\nSpring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "A WebFlux application with a compromised subdomain is vulnerable to a session fixation escalation attack that allows an attacker to exchange a known session ID for that of an authenticated user."
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.2,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-384",
"description": "CWE-384: Session Fixation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-23T20:41:11.906Z",
"orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
"shortName": "vmware"
},
"references": [
{
"url": "https://spring.io/security/cve-2026-41839"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Spring Framework Escalation via Session Fixation in WebFlux",
"x_generator": {
"engine": "Vulnogram 1.0.1"
}
}
},
"cveMetadata": {
"assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
"assignerShortName": "vmware",
"cveId": "CVE-2026-41839",
"datePublished": "2026-06-09T03:49:52.381Z",
"dateReserved": "2026-04-22T06:22:01.123Z",
"dateUpdated": "2026-06-23T20:41:11.906Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
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.
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.
Loading…