{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://repo.hex.pm",
          "cpes": [
            "cpe:2.3:a:qcam:saxy:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "\u0027Elixir.Saxy\u0027",
            "\u0027Elixir.Saxy.Encoder\u0027",
            "\u0027Elixir.Saxy.XML\u0027"
          ],
          "packageName": "saxy",
          "packageURL": "pkg:hex/saxy",
          "product": "saxy",
          "programFiles": [
            "lib/saxy.ex",
            "lib/saxy/encoder.ex",
            "lib/saxy/xml.ex"
          ],
          "programRoutines": [
            {
              "name": "\u0027Elixir.Saxy\u0027:encode!/2"
            },
            {
              "name": "\u0027Elixir.Saxy\u0027:encode_to_iodata!/2"
            },
            {
              "name": "\u0027Elixir.Saxy.XML\u0027:comment/1"
            }
          ],
          "repo": "https://github.com/qcam/saxy",
          "vendor": "qcam",
          "versions": [
            {
              "lessThan": "1.7.0",
              "status": "affected",
              "version": "0.7.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://github.com",
          "cpes": [
            "cpe:2.3:a:qcam:saxy:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "\u0027Elixir.Saxy\u0027",
            "\u0027Elixir.Saxy.Encoder\u0027",
            "\u0027Elixir.Saxy.XML\u0027"
          ],
          "packageName": "qcam/saxy",
          "packageURL": "pkg:github/qcam/saxy",
          "product": "saxy",
          "programFiles": [
            "lib/saxy.ex",
            "lib/saxy/encoder.ex",
            "lib/saxy/xml.ex"
          ],
          "programRoutines": [
            {
              "name": "\u0027Elixir.Saxy\u0027:encode!/2"
            },
            {
              "name": "\u0027Elixir.Saxy\u0027:encode_to_iodata!/2"
            },
            {
              "name": "\u0027Elixir.Saxy.XML\u0027:comment/1"
            }
          ],
          "repo": "https://github.com/qcam/saxy",
          "vendor": "qcam",
          "versions": [
            {
              "lessThan": "6d12ee12b9e32e86ef598b3f3cafccd1840b2f41",
              "status": "affected",
              "version": "7266632e9407842f28ffac254c56dc41210a5690",
              "versionType": "git"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eOnly applications that place untrusted text into an XML comment node are affected. The untrusted value must reach \u003ccode\u003eSaxy.XML.comment/1\u003c/code\u003e or a raw \u003ccode\u003e{:comment, text}\u003c/code\u003e simple form child that is then serialized with \u003ccode\u003eSaxy.encode!/2\u003c/code\u003e or \u003ccode\u003eSaxy.encode_to_iodata!/2\u003c/code\u003e. Documents that are only parsed by Saxy never reach the encoder and are not a vector.\u003c/p\u003e"
            },
            {
              "base64": false,
              "type": "text/markdown",
              "value": "Only applications that place untrusted text into an XML comment node are affected. The untrusted value must reach `Saxy.XML.comment/1` or a raw `{:comment, text}` simple form child that is then serialized with `Saxy.encode!/2` or `Saxy.encode_to_iodata!/2`. Documents that are only parsed by Saxy never reach the encoder and are not a vector."
            }
          ],
          "value": "Only applications that place untrusted text into an XML comment node are affected. The untrusted value must reach Saxy.XML.comment/1 or a raw {:comment, text} simple form child that is then serialized with Saxy.encode!/2 or Saxy.encode_to_iodata!/2. Documents that are only parsed by Saxy never reach the encoder and are not a vector."
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:qcam:saxy:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "1.7.0",
                  "versionStartIncluding": "0.7.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ],
          "operator": "AND"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Peter Ullrich"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "Peter Ullrich"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Peter Ullrich"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "C\u1ea9m Hu\u1ef3nh"
        },
        {
          "lang": "en",
          "type": "analyst",
          "value": "Jonatan M\u00e4nnchen / EEF"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Peter Ullrich"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eXML injection in the encoder of Saxy. \u003ccode\u003eSaxy.Encoder\u003c/code\u003e does not neutralize the \u003ccode\u003e--\u003c/code\u003e sequence in XML comment content: \u003ccode\u003eescape_comment/2\u003c/code\u003e returns the comment binary unchanged in every clause and only appends a space when the comment ends in a single \u003ccode\u003e-\u003c/code\u003e, so neither an interior \u003ccode\u003e--\u003c/code\u003e nor a full \u003ccode\u003e--\u0026gt;\u003c/code\u003e is escaped or rejected before the encoder wraps the content in the \u003ccode\u003e\u0026lt;!--\u003c/code\u003e and \u003ccode\u003e--\u0026gt;\u003c/code\u003e delimiters.\u003c/p\u003e\n\u003cp\u003eWhen an application serializes attacker-controlled text as a comment, through \u003ccode\u003eSaxy.XML.comment/1\u003c/code\u003e or a raw \u003ccode\u003e{:comment, text}\u003c/code\u003e simple form child, the attacker can close the comment early with \u003ccode\u003e--\u0026gt;\u003c/code\u003e and inject arbitrary sibling markup into the serialized document. A downstream parser then sees elements, attributes, and text that the application never built. Where the document is rendered as HTML or SVG, the injected markup executes as stored cross-site scripting; where it is consumed by another XML processor, the attacker can forge data that the producing application never emitted. Documents that Saxy only parses are not a vector.\u003c/p\u003e\n\u003cp\u003eThis issue affects saxy: from 0.7.0 before 1.7.0.\u003c/p\u003e"
            },
            {
              "base64": false,
              "type": "text/markdown",
              "value": "XML injection in the encoder of Saxy. `Saxy.Encoder` does not neutralize the `--` sequence in XML comment content: `escape_comment/2` returns the comment binary unchanged in every clause and only appends a space when the comment ends in a single `-`, so neither an interior `--` nor a full `--\u003e` is escaped or rejected before the encoder wraps the content in the `\u003c!--` and `--\u003e` delimiters.\n\nWhen an application serializes attacker-controlled text as a comment, through `Saxy.XML.comment/1` or a raw `{:comment, text}` simple form child, the attacker can close the comment early with `--\u003e` and inject arbitrary sibling markup into the serialized document. A downstream parser then sees elements, attributes, and text that the application never built. Where the document is rendered as HTML or SVG, the injected markup executes as stored cross-site scripting; where it is consumed by another XML processor, the attacker can forge data that the producing application never emitted. Documents that Saxy only parses are not a vector.\n\nThis issue affects saxy: from 0.7.0 before 1.7.0."
            }
          ],
          "value": "XML injection in the encoder of Saxy. Saxy.Encoder does not neutralize the -- sequence in XML comment content: escape_comment/2 returns the comment binary unchanged in every clause and only appends a space when the comment ends in a single -, so neither an interior -- nor a full --\u003e is escaped or rejected before the encoder wraps the content in the \u003c!-- and --\u003e delimiters.\n\nWhen an application serializes attacker-controlled text as a comment, through Saxy.XML.comment/1 or a raw {:comment, text} simple form child, the attacker can close the comment early with --\u003e and inject arbitrary sibling markup into the serialized document. A downstream parser then sees elements, attributes, and text that the application never built. Where the document is rendered as HTML or SVG, the injected markup executes as stored cross-site scripting; where it is consumed by another XML processor, the attacker can forge data that the producing application never emitted. Documents that Saxy only parses are not a vector.\n\nThis issue affects saxy: from 0.7.0 before 1.7.0."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-250",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-250 XML Injection"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "LOCAL",
            "baseScore": 2.1,
            "baseSeverity": "LOW",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "LOW",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-91",
              "description": "CWE-91 XML Injection",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-06T10:16:42.053Z",
        "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "shortName": "EEF"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory",
            "related"
          ],
          "url": "https://github.com/qcam/saxy/security/advisories/GHSA-mm3m-xwmf-v698"
        },
        {
          "name": "EEF CNA record for CVE-2026-66293",
          "tags": [
            "related"
          ],
          "url": "https://cna.erlef.org/cves/CVE-2026-66293.html"
        },
        {
          "name": "OSV record EEF-CVE-2026-66293",
          "tags": [
            "related"
          ],
          "url": "https://osv.dev/vulnerability/EEF-CVE-2026-66293"
        },
        {
          "name": "Introducing commit 7266632 in qcam/saxy",
          "tags": [
            "related"
          ],
          "url": "https://github.com/qcam/saxy/commit/7266632e9407842f28ffac254c56dc41210a5690"
        },
        {
          "name": "Fix commit 6d12ee1 in qcam/saxy",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/qcam/saxy/commit/6d12ee12b9e32e86ef598b3f3cafccd1840b2f41"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "XML comment injection in Saxy encoder via unescaped double hyphen",
      "workarounds": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eReject or rewrite the \u003ccode\u003e--\u003c/code\u003e sequence in untrusted text before passing it to \u003ccode\u003eSaxy.XML.comment/1\u003c/code\u003e, for example by replacing \u003ccode\u003e--\u003c/code\u003e with \u003ccode\u003e- -\u003c/code\u003e.\u003c/p\u003e\n\u003cp\u003eAlternatively, stop emitting untrusted data as XML comments. Comments carry no semantic payload for consumers, so the text can usually be moved into an element or a CDATA section instead.\u003c/p\u003e"
            },
            {
              "base64": false,
              "type": "text/markdown",
              "value": "Reject or rewrite the `--` sequence in untrusted text before passing it to `Saxy.XML.comment/1`, for example by replacing `--` with `- -`.\n\nAlternatively, stop emitting untrusted data as XML comments. Comments carry no semantic payload for consumers, so the text can usually be moved into an element or a CDATA section instead."
            }
          ],
          "value": "Reject or rewrite the -- sequence in untrusted text before passing it to Saxy.XML.comment/1, for example by replacing -- with - -.\n\nAlternatively, stop emitting untrusted data as XML comments. Comments carry no semantic payload for consumers, so the text can usually be moved into an element or a CDATA section instead."
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
    "assignerShortName": "EEF",
    "cveId": "CVE-2026-66293",
    "datePublished": "2026-11-06T10:16:42.053Z",
    "dateReserved": "2026-07-24T14:10:01.114Z",
    "dateUpdated": "2026-11-06T10:16:42.053Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}