CVE-2026-46490 (GCVE-0-2026-46490)

Vulnerability from cvelistv5 – Published: 2026-06-08 18:41 – Updated: 2026-06-09 15:13
VLAI
Title
samlify: XML Injection in AttributeValue Allows Privilege Escalation in Signed SAML Assertions
Summary
samlify is a Node.js library for SAML single sign-on. Prior to version 2.13.0, samlify’s template substitution only escapes attribute contexts. Values inserted into element text (e.g., <saml:AttributeValue>) are not escaped. A normal user can inject XML markup into an attribute value (e.g., email, name) and add new <saml:Attribute> elements inside the signed assertion. The IdP then signs the tampered assertion and the SP accepts the injected attributes as trusted. This allows privilege escalation when attributes are used for authorization (roles/groups). This issue has been patched in version 2.13.0.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-91 - XML Injection (aka Blind XPath Injection)
Assigner
References
Impacted products
Vendor Product Version
tngan samlify Affected: < 2.13.0
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-46490",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-09T14:51:00.913741Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-09T15:13:53.540Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/tngan/samlify/security/advisories/GHSA-34r5-q4jw-r36m"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "samlify",
          "vendor": "tngan",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.13.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "samlify is a Node.js library for SAML single sign-on. Prior to version 2.13.0, samlify\u2019s template substitution only escapes attribute contexts. Values inserted into element text (e.g., \u003csaml:AttributeValue\u003e) are not escaped. A normal user can inject XML markup into an attribute value (e.g., email, name) and add new \u003csaml:Attribute\u003e elements inside the signed assertion. The IdP then signs the tampered assertion and the SP accepts the injected attributes as trusted. This allows privilege escalation when attributes are used for authorization (roles/groups). This issue has been patched in version 2.13.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-91",
              "description": "CWE-91: XML Injection (aka Blind XPath Injection)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-08T18:41:40.145Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/tngan/samlify/security/advisories/GHSA-34r5-q4jw-r36m",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/tngan/samlify/security/advisories/GHSA-34r5-q4jw-r36m"
        }
      ],
      "source": {
        "advisory": "GHSA-34r5-q4jw-r36m",
        "discovery": "UNKNOWN"
      },
      "title": "samlify: XML Injection in AttributeValue Allows Privilege Escalation in Signed SAML Assertions"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-46490",
    "datePublished": "2026-06-08T18:41:40.145Z",
    "dateReserved": "2026-05-14T18:06:06.811Z",
    "dateUpdated": "2026-06-09T15:13:53.540Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-46490",
      "date": "2026-07-28",
      "epss": "0.00469",
      "percentile": "0.3802"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-46490\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-06-08T19:16:45.950\",\"lastModified\":\"2026-07-23T08:10:00.137\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"samlify is a Node.js library for SAML single sign-on. Prior to version 2.13.0, samlify\u2019s template substitution only escapes attribute contexts. Values inserted into element text (e.g., \u003csaml:AttributeValue\u003e) are not escaped. A normal user can inject XML markup into an attribute value (e.g., email, name) and add new \u003csaml:Attribute\u003e elements inside the signed assertion. The IdP then signs the tampered assertion and the SP accepts the injected attributes as trusted. This allows privilege escalation when attributes are used for authorization (roles/groups). This issue has been patched in version 2.13.0.\"},{\"lang\":\"es\",\"value\":\"samlify es una biblioteca Node.js para inicio de sesi\u00f3n \u00fanico SAML. Anterior a la versi\u00f3n 2.13.0, la sustituci\u00f3n de plantillas de samlify solo escapa contextos de atributos. Los valores insertados en el texto del elemento (p. ej., \u003csaml:AttributeValue\u003e) no se escapan. Un usuario normal puede inyectar marcado XML en un valor de atributo (p. ej., correo electr\u00f3nico, nombre) y a\u00f1adir nuevos elementos \u003csaml:Attribute\u003e dentro de la aserci\u00f3n firmada. El IdP luego firma la aserci\u00f3n manipulada y el SP acepta los atributos inyectados como confiables. Esto permite la escalada de privilegios cuando los atributos se utilizan para la autorizaci\u00f3n (roles/grupos). Este problema ha sido parcheado en la versi\u00f3n 2.13.0.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"tngan\",\"product\":\"samlify\",\"versions\":[{\"version\":\"\u003c 2.13.0\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/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\",\"baseScore\":8.7,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-06-09T14:51:00.913741Z\",\"id\":\"CVE-2026-46490\",\"options\":[{\"exploitation\":\"poc\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-91\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:samlify_project:samlify:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"2.13.0\",\"matchCriteriaId\":\"388249D4-2C25-4190-AE01-8F3CAD3E2C07\"}]}]}],\"references\":[{\"url\":\"https://github.com/tngan/samlify/security/advisories/GHSA-34r5-q4jw-r36m\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]},{\"url\":\"https://github.com/tngan/samlify/security/advisories/GHSA-34r5-q4jw-r36m\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "current_release_date": "2026-06-09T20:59:24+00:00",
      "cve": "CVE-2026-46490",
      "id": "CVE-2026-46490",
      "initial_release_date": "2026-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "samlify: XML Injection in AttributeValue Allows Privilege Escalation in Signed SAML Assertions",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46490.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"cna\": {\"title\": \"samlify: XML Injection in AttributeValue Allows Privilege Escalation in Signed SAML Assertions\", \"source\": {\"advisory\": \"GHSA-34r5-q4jw-r36m\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 8.7, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"tngan\", \"product\": \"samlify\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 2.13.0\"}]}], \"references\": [{\"url\": \"https://github.com/tngan/samlify/security/advisories/GHSA-34r5-q4jw-r36m\", \"name\": \"https://github.com/tngan/samlify/security/advisories/GHSA-34r5-q4jw-r36m\", \"tags\": [\"x_refsource_CONFIRM\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"samlify is a Node.js library for SAML single sign-on. Prior to version 2.13.0, samlify\\u2019s template substitution only escapes attribute contexts. Values inserted into element text (e.g., \u003csaml:AttributeValue\u003e) are not escaped. A normal user can inject XML markup into an attribute value (e.g., email, name) and add new \u003csaml:Attribute\u003e elements inside the signed assertion. The IdP then signs the tampered assertion and the SP accepts the injected attributes as trusted. This allows privilege escalation when attributes are used for authorization (roles/groups). This issue has been patched in version 2.13.0.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-91\", \"description\": \"CWE-91: XML Injection (aka Blind XPath Injection)\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-06-08T18:41:40.145Z\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-46490\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-09T14:51:00.913741Z\"}}}], \"references\": [{\"url\": \"https://github.com/tngan/samlify/security/advisories/GHSA-34r5-q4jw-r36m\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"shortName\": \"CISA-ADP\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"dateUpdated\": \"2026-06-09T14:51:10.801Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-46490\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-08T18:41:40.145Z\", \"dateReserved\": \"2026-05-14T18:06:06.811Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-06-08T18:41:40.145Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.