{"id":"CVE-2026-58402","state":"PUBLISHED","title":"Hugo default code block renderer XSS via unescaped code-fence language","description":"Hugo is a static site generator. From 0.60.0 until 0.163.3, Hugo's default code-block renderer wrote the Markdown code-fence language or info-string into the code class=\"language-…\" data-lang=\"…\" wrapper without HTML escaping. A fence info-string containing a quote and a script payload breaks out of the attribute and injects a live script element. This issue is fixed in 0.163.3.","publishedAt":"2026-07-06T19:19:58.754Z","updatedAt":"2026-07-06T20:54:38.775Z","severity":{"score":5.1,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["gohugoio hugo"],"affected":[{"vendor":"gohugoio","product":"hugo","versions":[{"version":">= 0.60.0, < 0.163.3","status":"affected"}]}],"references":["https://github.com/gohugoio/hugo/security/advisories/GHSA-q76j-gcg9-vxc6","https://github.com/gohugoio/hugo/pull/15051","https://github.com/gohugoio/hugo/commit/ce1a7e0bce3713af40496ded3c2c0ceeed49231d","https://github.com/gohugoio/hugo/releases/tag/v0.163.3"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/58xxx/CVE-2026-58402.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-58402","state":"PUBLISHED","datePublished":"2026-07-06T19:19:58.754Z","dateUpdated":"2026-07-06T20:54:38.775Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-30T18:19:58.378Z"},"containers":{"cna":{"title":"Hugo default code block renderer XSS via unescaped code-fence language","descriptions":[{"lang":"en","value":"Hugo is a static site generator. From 0.60.0 until 0.163.3, Hugo's default code-block renderer wrote the Markdown code-fence language or info-string into the code class=\"language-…\" data-lang=\"…\" wrapper without HTML escaping. A fence info-string containing a quote and a script payload breaks out of the attribute and injects a live script element. This issue is fixed in 0.163.3."}],"affected":[{"vendor":"gohugoio","product":"hugo","versions":[{"version":">= 0.60.0, < 0.163.3","status":"affected"}]}],"references":[{"url":"https://github.com/gohugoio/hugo/security/advisories/GHSA-q76j-gcg9-vxc6","name":"https://github.com/gohugoio/hugo/security/advisories/GHSA-q76j-gcg9-vxc6","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/gohugoio/hugo/pull/15051","name":"https://github.com/gohugoio/hugo/pull/15051","tags":["x_refsource_MISC"]},{"url":"https://github.com/gohugoio/hugo/commit/ce1a7e0bce3713af40496ded3c2c0ceeed49231d","name":"https://github.com/gohugoio/hugo/commit/ce1a7e0bce3713af40496ded3c2c0ceeed49231d","tags":["x_refsource_MISC"]},{"url":"https://github.com/gohugoio/hugo/releases/tag/v0.163.3","name":"https://github.com/gohugoio/hugo/releases/tag/v0.163.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":5.1,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-06T19:19:58.754Z"},"source":{"advisory":"GHSA-q76j-gcg9-vxc6","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-06T20:52:58.622823Z","id":"CVE-2026-58402","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-06T20:54:38.775Z"}}]}}}