CVE-2026-2709

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The project was informed of the problem early through an issue report but has not responded yet."}, {"lang": "es", "value": "Se ha encontrado una vulnerabilidad en busy hasta la versi\u00f3n 2.5.5 que afecta a una funci\u00f3n desconocida del archivo source-code/busy-master/src/server/app.js del componente Callback Gestor. Si se manipula el argumento state se puede provocar una redirecci\u00f3n abierta. Es posible lanzar el ataque en remoto. El exploit ha sido publicado y puede ser utilizado. Se inform\u00f3 al proyecto de la divulgaci\u00f3n con antelaci\u00f3n a trav\u00e9s de un informe de incidencias, pero a\u00fan no ha respondido."}], "id": "CVE-2026-2709", "lastModified": "2026-06-17T10:31:35.070", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 4.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.5, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.1, "impactScore": 1.4, "source": "cna@vuldb.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.5, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.1, "impactScore": 1.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.0, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/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": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-2709", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-02-23T18:36:39.542842Z", "version": "2.0.3"}}]}, "published": "2026-02-19T07:17:50.553", "references": [{"source": "cna@vuldb.com", "url": "https://github.com/busyorg/busy/issues/2287"}, {"source": "cna@vuldb.com", "url": "https://github.com/busyorg/busy/issues/2287#issue-3905518966"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/?ctiid.346661"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/?id.346661"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/?submit.753299"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-601"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.5.0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.5.1"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.5.2"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.5.3"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.5.4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.5.5"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}]}, "original": {"product": "busy", "source": "cna", "vendor": "n/a"}, "product": "busy", "vendor": "busyorg"}], "analysis": {"en": {"generated_at": "2026-04-18T11:50:57.537354+00:00", "value": {"mitigation_remediation": ["Upgrade busy to a newer release where the redirect defect is fixed, if available", "Configure the application to enforce a whitelist of acceptable redirect URLs and reject all others", "Disable the callback handler feature if it is not required for your deployment"], "summary": {"action": "Assess Impact", "impact": "Open Redirect via Unvalidated Parameter"}, "threat_synthesis": {"affected_systems": "The vulnerability exists in the busy application hosted on the busyorg GitHub repository, affecting all releases up to and including version 2.5.5. The offending code resides in the file source-code/busy-master/src/server/app.js within the callback handler component. No other vendors or product variants are listed as affected by the CNA data.", "description_and_impact": "The flaw in busy\u2019s callback handler lets an attacker supply a manipulated state argument that causes the application to redirect to any URL specified by the attacker. This unvalidated redirect flaw is a classic example of CWE\u2011601, making it possible to lure users to malicious sites, which can enable phishing or drive\u2013by\u2011download attacks. The impact is primarily on user trust and possible compromise of subsequent sessions, rather than direct compromise of the server itself.", "risk_and_exploitability": "The CVSS base score of 5.1 indicates moderate severity. The EPSS score of less than 1\u202f% suggests a very low probability that the vulnerability has been exploited yet, and it is not listed in the CISA KEV catalog. Nonetheless, because the attack can be launched remotely by simply visiting a crafted URL, the risk to end users remains real and can be magnified if the application is used as part of a user\u2011facing service. Monitoring for suspicious redirects and limiting redirect targets are recommended to mitigate the potential for phishing or credential\u2011stealing attacks."}}}}, "created": "2026-02-19T10:06:43.432974+00:00", "updated": "2026-04-18T12:00:05.882794+00:00", "vendors": ["busyorg", "busyorg$PRODUCT$busy"]}