{"containers":{"cna":{"affected":[{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:qcam:saxy:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Saxy'","'Elixir.Saxy.Encoder'","'Elixir.Saxy.XML'"],"packageName":"saxy","packageURL":"pkg:hex/saxy","product":"saxy","programFiles":["lib/saxy.ex","lib/saxy/encoder.ex","lib/saxy/xml.ex"],"programRoutines":[{"name":"'Elixir.Saxy':encode!/2"},{"name":"'Elixir.Saxy':encode_to_iodata!/2"},{"name":"'Elixir.Saxy.XML':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":["'Elixir.Saxy'","'Elixir.Saxy.Encoder'","'Elixir.Saxy.XML'"],"packageName":"qcam/saxy","packageURL":"pkg:github/qcam/saxy","product":"saxy","programFiles":["lib/saxy.ex","lib/saxy/encoder.ex","lib/saxy/xml.ex"],"programRoutines":[{"name":"'Elixir.Saxy':encode!/2"},{"name":"'Elixir.Saxy':encode_to_iodata!/2"},{"name":"'Elixir.Saxy.XML':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":"<p>Only applications that place untrusted text into an XML comment node are affected. The untrusted value must reach <code>Saxy.XML.comment/1</code> or a raw <code>{:comment, text}</code> simple form child that is then serialized with <code>Saxy.encode!/2</code> or <code>Saxy.encode_to_iodata!/2</code>. Documents that are only parsed by Saxy never reach the encoder and are not a vector.</p>"},{"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":"Cẩm Huỳnh"},{"lang":"en","type":"analyst","value":"Jonatan Männchen / EEF"},{"lang":"en","type":"coordinator","value":"Peter Ullrich"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>XML injection in the encoder of Saxy. <code>Saxy.Encoder</code> does not neutralize the <code>--</code> sequence in XML comment content: <code>escape_comment/2</code> returns the comment binary unchanged in every clause and only appends a space when the comment ends in a single <code>-</code>, so neither an interior <code>--</code> nor a full <code>--&gt;</code> is escaped or rejected before the encoder wraps the content in the <code>&lt;!--</code> and <code>--&gt;</code> delimiters.</p>\n<p>When an application serializes attacker-controlled text as a comment, through <code>Saxy.XML.comment/1</code> or a raw <code>{:comment, text}</code> simple form child, the attacker can close the comment early with <code>--&gt;</code> 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.</p>\n<p>This issue affects saxy: from 0.7.0 before 1.7.0.</p>"},{"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 `-->` is escaped or rejected before the encoder wraps the content in the `<!--` and `-->` 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 `-->` 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 --> is escaped or rejected before the encoder wraps the content in the <!-- and --> 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 --> 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":"<p>Reject or rewrite the <code>--</code> sequence in untrusted text before passing it to <code>Saxy.XML.comment/1</code>, for example by replacing <code>--</code> with <code>- -</code>.</p>\n<p>Alternatively, 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.</p>"},{"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"}