CVE-2026-1435

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The application generates a new 'sessionId' each time a user authenticates, but does not invalidate previously issued session identifiers, which remain valid even after multiple consecutive logins by the same user. As a result, a stolen or leaked 'sessionId' can continue to be used to authenticate valid requests. Exploiting this vulnerability would allow an attacker with access to the web service/API network (port 9000 or HTTP/S endpoint of the server) to reuse an old session token to gain unauthorized access to the application, interact with the API/web, and compromise the integrity of the affected account."}], "value": "Not properly invalidated session vulnerability in Graylog Web Interface, version 2.2.3, due to incorrect management of session invalidation after new logins. 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Graylog Web Interface", "vendor": "Graylog", "versions": [{"status": "affected", "version": "2.2.3"}]}], "source": "cve-coordination@incibe.es"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:graylog:graylog:2.2.3:*:*:*:*:*:*:*", "matchCriteriaId": "A16887AF-88FA-4E84-8AD7-F3EBA153E453", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Not properly invalidated session vulnerability in Graylog Web Interface, version 2.2.3, due to incorrect management of session invalidation after new logins. The application generates a new 'sessionId' each time a user authenticates, but does not invalidate previously issued session identifiers, which remain valid even after multiple consecutive logins by the same user. As a result, a stolen or leaked 'sessionId' can continue to be used to authenticate valid requests. Exploiting this vulnerability would allow an attacker with access to the web service/API network (port 9000 or HTTP/S endpoint of the server) to reuse an old session token to gain unauthorized access to the application, interact with the API/web, and compromise the integrity of the affected account."}, {"lang": "es", "value": "Vulnerabilidad de sesi\u00f3n no invalidada correctamente en la interfaz web de Graylog, versi\u00f3n 2.2.3, debido a una gesti\u00f3n incorrecta de la invalidaci\u00f3n de la sesi\u00f3n despu\u00e9s de nuevos inicios de sesi\u00f3n. La aplicaci\u00f3n genera un nuevo 'sessionId' cada vez que un usuario se autentica, pero no invalida los identificadores de sesi\u00f3n emitidos previamente, los cuales permanecen v\u00e1lidos incluso despu\u00e9s de m\u00faltiples inicios de sesi\u00f3n consecutivos por el mismo usuario. Como resultado, un 'sessionId' robado o filtrado puede seguir siendo utilizado para autenticar solicitudes v\u00e1lidas. La explotaci\u00f3n de esta vulnerabilidad permitir\u00eda a un atacante con acceso a la red del servicio web/API (puerto 9000 o punto final HTTP/S del servidor) reutilizar un token de sesi\u00f3n antiguo para obtener acceso no autorizado a la aplicaci\u00f3n, interactuar con la API/web, y comprometer la integridad de la cuenta afectada."}], "id": "CVE-2026-1435", "lastModified": "2026-06-17T10:15:46.990", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.3, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cve-coordination@incibe.es", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-1435", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-02-18T20:24:23.637951Z", "version": "2.0.3"}}]}, "published": "2026-02-18T14:16:05.700", "references": [{"source": "cve-coordination@incibe.es", "tags": ["Third Party Advisory"], "url": "https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-graylog"}], "sourceIdentifier": "cve-coordination@incibe.es", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-613"}], "source": "cve-coordination@incibe.es", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.2.3"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "Graylog Web Interface", "source": "cna", "vendor": "Graylog"}, "product": "graylog_web_interface", "vendor": "graylog"}], "analysis": {"en": {"generated_at": "2026-04-17T18:46:18.886699+00:00", "value": {"mitigation_remediation": ["Upgrade Graylog Web Interface to the latest available version, where session invalidation has been fixed and older versions are no longer maintained.", "Configure Graylog to enforce session expiration and to remove all pending session identifiers upon any new login event so that stale tokens cannot be reused.", "Apply network segmentation or firewall rules to restrict access to the Graylog API and port 9000 to trusted hosts, reducing the surface area for an attacker to capture session identifiers."], "summary": {"action": "Immediate Patch", "impact": "Unauthorized session hijacking via reuse of old session tokens"}, "threat_synthesis": {"affected_systems": "Graylog Web Interface, specifically version 2.2.3. All earlier Graylog releases are considered obsolete and unpatched for this issue.", "description_and_impact": "The vulnerability in Graylog Web Interface 2.2.3 allows a session identifier that was issued during a prior login to remain valid even after a new login occurs. Each authentication generates a new sessionId but does not properly invalidate previous ones. Consequently, a compromised or leaked sessionId can be replayed, enabling an attacker to authenticate as that user, interact with the API or web interface, and alter the contents under that account, thereby compromising integrity of user data and system operations.", "risk_and_exploitability": "The CVSS severity score is 9.3, indicating high impact. The EPSS score is below 1%, suggesting a low but nonzero exploitation probability. The vulnerability is not currently listed in the CISA KEV catalog. Based on the description, it is inferred that an attacker would need remote access to the Graylog web service or API, typically via port 9000 or an HTTPS endpoint, to capture a sessionId and then replay it. The primary attack vector is remote through HTTP(S) requests, with the prerequisite of obtaining or intercepting a valid sessionId."}}}}, "created": "2026-02-19T10:20:14.292476+00:00", "updated": "2026-04-17T19:00:10.991000+00:00", "vendors": ["graylog", "graylog$PRODUCT$graylog_web_interface"]}