{
  "affected": [
    {
      "affectedData": [
        {
          "product": "OpenAM",
          "vendor": "OpenIdentityPlatform",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 16.0.6"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openidentityplatform:openam:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "448995F0-D580-4B7A-AF84-7FDB93013B6A",
              "versionEndExcluding": "16.0.6",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Open Access Management (OpenAM) is an access management solution. Prior to 16.0.6, OpenIdentityPlatform OpenAM is vulnerable to pre-authentication Remote Code Execution (RCE) via unsafe Java deserialization of the jato.clientSession HTTP parameter. This bypasses the WhitelistObjectInputStream mitigation that was applied to the jato.pageSession parameter after CVE-2021-35464. An unauthenticated attacker can achieve arbitrary command execution on the server by sending a crafted serialized Java object as the jato.clientSession GET/POST parameter to any JATO ViewBean endpoint whose JSP contains \u003cjato:form\u003e tags (e.g., the Password Reset pages). This vulnerability is fixed in 16.0.6."
    },
    {
      "lang": "es",
      "value": "Open Access Management (OpenAM) es una soluci\u00f3n de gesti\u00f3n de acceso. Antes de la versi\u00f3n 16.0.6, OpenIdentityPlatform OpenAM es vulnerable a la Ejecuci\u00f3n Remota de C\u00f3digo (RCE) de pre-autenticaci\u00f3n a trav\u00e9s de deserializaci\u00f3n Java insegura del par\u00e1metro HTTP jato.clientSession. Esto elude la mitigaci\u00f3n WhitelistObjectInputStream que se aplic\u00f3 al par\u00e1metro jato.pageSession despu\u00e9s de CVE-2021-35464. Un atacante no autenticado puede lograr la ejecuci\u00f3n arbitraria de comandos en el servidor enviando un objeto Java serializado manipulado como el par\u00e1metro GET/POST jato.clientSession a cualquier punto final JATO ViewBean cuyo JSP contiene etiquetas \u003cjato:form\u003e (por ejemplo, las p\u00e1ginas de Restablecimiento de Contrase\u00f1a). Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 16.0.6."
    }
  ],
  "id": "CVE-2026-33439",
  "lastModified": "2026-07-24T23:10:00.563",
  "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: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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-33439",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-08T16:11:05.727049Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-07T21:17:17.407",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-2cqq-rpvq-g5qj"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 16.0.5"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "org.openidentityplatform.openam:openam"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "16.0.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33439"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-07T15:45:50Z",
    "nvd_published_at": "2026-04-07T21:17:17Z",
    "severity": "CRITICAL"
  },
  "details": "## Summary\n\nOpenIdentityPlatform OpenAM 16.0.5 (and likely earlier versions) is vulnerable to pre-authentication Remote Code Execution (RCE) via unsafe Java deserialization of the `jato.clientSession` HTTP parameter. This bypasses the `WhitelistObjectInputStream` mitigation that was applied to the `jato.pageSession` parameter after CVE-2021-35464.\n\nAn unauthenticated attacker can achieve arbitrary command execution on the server by sending a crafted serialized Java object as the `jato.clientSession` GET/POST parameter to any JATO ViewBean endpoint whose JSP contains `\u003cjato:form\u003e` tags (e.g., the Password Reset pages).\n\n---\n\n## Vulnerability Details\n\n### Background\n\nCVE-2021-35464 identified that the `jato.pageSession` HTTP parameter was deserialized without class filtering, allowing pre-auth RCE.\n\nOpenIdentityPlatform OpenAM mitigated this by introducing `WhitelistObjectInputStream` in `ConsoleViewBeanBase.deserializePageAttributes()`, which restricts `jato.pageSession` deserialization to a hardcoded whitelist of ~40 safe classes.\n\nHowever, the JATO framework contains a **second deserialization entry point** \u2014 `jato.clientSession` \u2014 handled by `ClientSession.deserializeAttributes()`. This code path was **not patched** and still uses the unfiltered `Encoder.deserialize()` \u2192 `ApplicationObjectInputStream`, which performs `ObjectInputStream.readObject()` with no class whitelist.\n\n### Root Cause\n\n```\nClientSession.deserializeAttributes()\n  \u2192 Encoder.deserialize()\n    \u2192 ApplicationObjectInputStream.readObject()  // VULNERABLE \u2014 no whitelist\n```\n\nThe `ClientSession` object is instantiated in `RequestContextImpl.getClientSession()` with the raw `jato.clientSession` parameter value from the HTTP request. Deserialization is triggered during JSP rendering when `\u003cjato:form\u003e` tags invoke `getClientSession()` \u2192 `hasAttributes()` \u2192 `getEncodedString()` \u2192 `isValid()` \u2192 `ensureAttributes()` \u2192 `deserializeAttributes()`.\n\n### Affected Code\n\n**File:** `com/iplanet/jato/ClientSession.java`\n```java\nprotected ClientSession(RequestContext context) {\n    this.encodedSessionString =\n        context.getRequest().getParameter(\"jato.clientSession\");\n}\n\nprotected void deserializeAttributes() {\n    if (this.encodedSessionString != null\n        \u0026\u0026 this.encodedSessionString.trim().length() \u003e 0) {\n        this.setAttributes(\n            (Map) Encoder.deserialize(\n                Encoder.decodeHttp64(this.encodedSessionString), false)\n        );\n    }\n}\n```\n\n### Gadget Chain\n\nThe exploit uses classes bundled in the OpenAM WAR:\n\n```\nPriorityQueue.readObject()                        [java.util \u2014 JDK]\n  \u2192 heapify() \u2192 siftDown() \u2192 comparator.compare()\n    \u2192 Column$ColumnComparator.compare()            [openam-core-16.0.5.jar]\n      \u2192 Column.getProperty()\n        \u2192 PropertyUtils.getObjectPropertyValue()   [openam-core-16.0.5.jar]\n          \u2192 Method.invoke(TemplatesImpl, \"getOutputProperties\")\n            \u2192 TemplatesImpl.getOutputProperties()  [xalan-2.7.3.jar]\n              \u2192 newTransformer() \u2192 defineTransletClasses()\n                \u2192 TransletClassLoader.defineClass(_bytecodes)\n                  \u2192 _class[_transletIndex].newInstance()\n                    \u2192 EvilTranslet.\u003cclinit\u003e()      [attacker bytecode]\n                      \u2192 Runtime.getRuntime().exec(cmd)\n```\n\n---\n\n## Impact\n\n- **Pre-authentication** \u2014 no credentials or session tokens required\n- **Remote Code Execution** \u2014 arbitrary OS commands as the application server user\n- Full server compromise, lateral movement, data exfiltration\n- Affects any deployment with at least one accessible JATO endpoint whose JSP renders `\u003cjato:form\u003e` tags (e.g., Password Reset pages)\n\n---\n\n## Tested Environment\n\n- OpenIdentityPlatform OpenAM 16.0.5 (official release WAR from GitHub)\n- Apache Tomcat 10.1.52\n- Java 21.0.7 (Oracle JDK)\n- macOS / Linux (aarch64)\n- Also verified on `openidentityplatform/openam:latest` Docker image (Java 25)\n\n## Affected Versions\n\n- OpenIdentityPlatform OpenAM 16.0.5 (confirmed on both Docker and bare-metal Tomcat)\n- Likely all versions that left `ClientSession.deserializeAttributes()` unpatched\n\n---\n\n## Remediation\n\n1. Apply `WhitelistObjectInputStream` filtering to `ClientSession.deserializeAttributes()`, matching the mitigation already applied to `ConsoleViewBeanBase.deserializePageAttributes()`\n2. Audit all callers of `Encoder.deserialize()` for user-controlled input\n3. Consider adding a JVM-wide JEP 290 deserialization filter as defense-in-depth\n\n---\n\n## References\n\n- CVE-2021-35464 \u2014 Pre-auth RCE in ForgeRock OpenAM (PortSwigger Research)\n- https://portswigger.net/research/pre-auth-rce-in-forgerock-openam-cve-2021-35464\n- CWE-502: Deserialization of Untrusted Data\n\n---\n\n## Credit\n\nThis finding was discovered by **Rahul Maini and Hacktron AI** while auditing OpenIdentityPlatform OpenAM. Hacktron AI is our white-box pentest solution, designed to deliver high-accuracy results with minimal false positives.\n\n---\n\n## Disclosure Policy\n\nThis bug is subject to a 90-day disclosure deadline. If a fix for this issue is made available to users before the end of the 90-day deadline, this bug report will become public on the day that the fix was made available or an earlier or later date if agreed by both parties. Otherwise, this bug report will become public at the deadline.\n\nIf another researcher discloses the proof-of-concept before any deadlines, we reserve the right to publish our findings.\n\nThe details of this bug may be privately disclosed to vulnerable parties, including but not limited to Hacktron AI\u0027s customers.",
  "id": "GHSA-2cqq-rpvq-g5qj",
  "modified": "2026-04-07T22:16:49Z",
  "published": "2026-04-07T15:45:50Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-2cqq-rpvq-g5qj"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33439"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OpenIdentityPlatform/OpenAM/commit/014007c63cacc834cc795a89fac0e611aebc4a32"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/OpenIdentityPlatform/OpenAM"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.0.6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenIdentityPlatform OpenAM: Pre-Authentication Remote Code Execution via `jato.clientSession` Deserialization in OpenAM"
}