CVE-2026-40459
PAC4J is vulnerable to LDAP Injection in multiple methods. A low-privileged remote attacker can inject crafted LDAP syntax into ID-based search parameters, potentially resulting in unauthorized LDAP queries and arbitrary directory operations.
This issue was fixed in PAC4J versions 4.5.10, 5.7.10 and 6.4.1
CVSS
- Versión: 4.0
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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
- Puntuación base: 8.7
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.68%
- Percentil entre todas las CVEs puntuadas: 51
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1210Exploitation of Remote Serviceslateral movement75 % - Impacto principal
T1078Valid Accountsstealth · persistence · privilege escalation · initial access70 % - Impacto secundario
T1005Data from Local Systemcollection65 %
AV:N/PR:L sin UI permite explotación remota con privilegios bajos (T1210). LDAP injection permite falsificar autenticación (T1078) y acceder a datos del directorio (T1005).
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-90
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-40459",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-40459",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2026-04-17T13:52:22.145596Z"
}
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.8,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 2.8
}
],
"cvssMetricV40": [
{
"type": "Secondary",
"source": "cvd@cert.pl",
"cvssData": {
"Safety": "NOT_DEFINED",
"version": "4.0",
"Recovery": "NOT_DEFINED",
"baseScore": 8.7,
"Automatable": "NOT_DEFINED",
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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",
"exploitMaturity": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "LOW",
"subIntegrityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"vulnAvailabilityImpact": "HIGH",
"availabilityRequirement": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"subConfidentialityImpact": "NONE",
"vulnConfidentialityImpact": "HIGH",
"confidentialityRequirement": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED"
}
}
]
},
"affected": [
{
"source": "cvd@cert.pl",
"affectedData": [
{
"vendor": "PAC4J",
"product": "PAC4J",
"versions": [
{
"status": "affected",
"version": "4.0",
"lessThan": "4.5.10",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.0",
"lessThan": "5.7.10",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.0",
"lessThan": "6.4.1",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
}
]
}
],
"published": "2026-04-17T14:16:34.123",
"references": [
{
"url": "https://cert.pl/en/posts/2026/04/CVE-2026-40458/",
"tags": [
"Third Party Advisory"
],
"source": "cvd@cert.pl"
},
{
"url": "https://www.pac4j.org/blog/security-advisory-pac4j-core-and-ldap.html",
"tags": [
"Vendor Advisory"
],
"source": "cvd@cert.pl"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "cvd@cert.pl",
"description": [
{
"lang": "en",
"value": "CWE-90"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "PAC4J is vulnerable to LDAP Injection in multiple methods. A low-privileged remote attacker can inject crafted LDAP syntax into ID-based search parameters, potentially resulting in unauthorized LDAP queries and arbitrary directory operations.\n\nThis issue was fixed in PAC4J versions 4.5.10, 5.7.10 and 6.4.1"
}
],
"lastModified": "2026-06-17T10:45:19.677",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FB457685-E812-4C2A-93D4-225AD4389495",
"versionEndExcluding": "4.5.10",
"versionStartIncluding": "4.0.0"
},
{
"criteria": "cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0A9A7C72-1A3D-4386-8324-D31767E591E7",
"versionEndExcluding": "5.7.10",
"versionStartIncluding": "5.0.0"
},
{
"criteria": "cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "2122C25D-17AE-4AED-A1FF-376A754963C0",
"versionEndExcluding": "6.4.1",
"versionStartIncluding": "6.0.0"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "cvd@cert.pl"
}