CVE-2026-3963

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The exploitability is reported as difficult. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way."}, {"lang": "es", "value": "Una falla de seguridad ha sido descubierta en perfree go-fastdfs-web hasta 1.3.7. Esto afecta la funci\u00f3n rememberMeManager del archivo src/main/java/com/perfree/config/ShiroConfig.java del componente Apache Shiro RememberMe. Realizar una manipulaci\u00f3n resulta en el uso de una clave criptogr\u00e1fica codificada de forma r\u00edgida. El ataque puede ser iniciado remotamente. La complejidad de un ataque es bastante alta. La explotabilidad se reporta como dif\u00edcil. El exploit ha sido publicado al p\u00fablico y puede ser usado para ataques. El proveedor fue contactado tempranamente sobre esta divulgaci\u00f3n pero no respondi\u00f3 de ninguna manera."}], "id": "CVE-2026-3963", "lastModified": "2026-06-17T10:44:31.433", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "HIGH", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 2.6, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:H/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 4.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "cna@vuldb.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.9, "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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/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": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-3963", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-12T13:35:04.604852Z", "version": "2.0.3"}}]}, "published": "2026-03-11T23:16:00.983", "references": [{"source": "cna@vuldb.com", "url": "https://vuldb.com/?ctiid.350392"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/?id.350392"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/?submit.768282"}, {"source": "cna@vuldb.com", "url": "https://www.notion.so/go-fastdfs-web-Hardcoded-Apache-Shiro-Cipher-Key-reach-RCE-313ea92a3c41806fae44dffe53e69751"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-320"}, {"lang": "en", "value": "CWE-321"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.3.0,1.3.7]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "go-fastdfs-web", "source": "cna", "vendor": "perfree"}, "product": "go-fastdfs-web", "vendor": "perfree"}], "analysis": {"en": {"generated_at": "2026-03-17T17:23:28.363398+00:00", "value": {"mitigation_remediation": ["Upgrade perfree go-fastdfs-web to a version beyond 1.3.7 if a patch or newer release removes the hard\u2011coded key. ", "Disable the RememberMe feature in Apache Shiro or configure it with a securely generated key instead of the static one. ", "Monitor application logs for unusual authentication token activity or cryptographic errors that may indicate exploitation attempts. ", "Keep the application and any underlying libraries up to date; check the vendor or open\u2011source repository for any updates or configuration guidance."], "summary": {"action": "Upgrade", "impact": "Potential unauthorized access"}, "threat_synthesis": {"affected_systems": "The CVE applies to the perfree:go-fastdfs-web application, with affected versions up to version 1.3.7, as indicated in the vendor description. No later versions are mentioned in the input. Users running any release of perfree go-fastdfs-web 1.3.7 or earlier are therefore potentially vulnerable.", "description_and_impact": "Perfree go-fastdfs-web versions 1.3.7 and earlier contain a flaw in the ShiroConfig rememberMeManager. A hard\u2011coded cryptographic key is used to encrypt and decrypt the RememberMe cookie, as noted in the vendor description. Because the key is static, an attacker can potentially forge or decrypt RememberMe tokens. The description does not state the exact impact, but a hard\u2011coded key in an authentication component commonly allows unauthorized access or session hijacking. This potential impact is inferred from the nature of the vulnerability and the use of a static key within the authentication flow.", "risk_and_exploitability": "The CVSS score of 6.3 places the weakness in the medium severity range, while a low EPSS (<1%) suggests that it is not currently widely exploited. The vendor has not published a fix, and the CVE is not listed in the CISA KEV catalog. The attack vector is remote, exploiting the RememberMe feature; the description states that manipulation results in use of the static key, and the exploit is reported as difficult but has been released publicly. Thus, the risk is moderate with a low probability of active exploitation at present, but the availability of a public exploit makes it prudent to act."}}}}, "created": "2026-03-12T09:55:07.014888+00:00", "updated": "2026-03-20T15:36:40.770688+00:00", "vendors": ["perfree", "perfree$PRODUCT$go-fastdfs-web"]}