{"id":"CVE-2026-106106","state":"PUBLISHED","title":"Quasar Framework: SSR/SSG dev error page discloses the full shell environment and its </script> escape is bypassable","description":"Quasar Framework is a framework for building high-performance Vue.js user interfaces. Prior to @quasar/render-ssr-error 2.2.4 and @quasar/app-vite 3.3.0, renderSSRError() in utils/render-ssr-error/src/index.js used diagnostic data from utils/render-ssr-error/src/env.js to serialize process.env, request headers, and cookies into the HTTP page returned by serve.devError(), while the development server listened on all interfaces by default. Any network-adjacent client that reaches an SSR or SSG render failure through this development-only error path can obtain shell environment secrets. The renderer escaped only one exact lowercase script closing-tag spelling, so case variants and valid closing-tag delimiter variants in reflected diagnostic data could terminate the script element and inject markup; executing the injected code in a developer browser additionally requires the payload to accompany that developer's request. This issue is fixed in @quasar/render-ssr-error 2.2.4 and @quasar/app-vite 3.3.0.","publishedAt":"2026-10-06T17:24:07.788Z","updatedAt":"2026-10-06T18:22:44.948Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:H/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["quasarframework quasar","@quasar render-ssr-error","@quasar app-vite"],"affected":[{"vendor":"quasarframework","product":"quasar","versions":[{"version":"< 2.23.3","status":"affected"}]},{"vendor":"@quasar","product":"render-ssr-error","versions":[{"version":"< 2.2.4","status":"affected"}]},{"vendor":"@quasar","product":"app-vite","versions":[{"version":"< 3.3.0","status":"affected"}]}],"references":["https://github.com/quasarframework/quasar/security/advisories/GHSA-r5mf-4r5x-q78f","https://github.com/quasarframework/quasar/commit/61c2bd8a607785fdade72cce20e8faf1de7eee15","https://github.com/quasarframework/quasar/releases/tag/@quasar/app-vite-v3.3.0"],"weaknesses":["CWE-79","CWE-497"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/106xxx/CVE-2026-106106.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-106106","state":"PUBLISHED","datePublished":"2026-10-06T17:24:07.788Z","dateUpdated":"2026-10-06T18:22:44.948Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-06T15:33:55.333Z"},"containers":{"cna":{"title":"Quasar Framework: SSR/SSG dev error page discloses the full shell environment and its </script> escape is bypassable","descriptions":[{"lang":"en","value":"Quasar Framework is a framework for building high-performance Vue.js user interfaces. Prior to @quasar/render-ssr-error 2.2.4 and @quasar/app-vite 3.3.0, renderSSRError() in utils/render-ssr-error/src/index.js used diagnostic data from utils/render-ssr-error/src/env.js to serialize process.env, request headers, and cookies into the HTTP page returned by serve.devError(), while the development server listened on all interfaces by default. Any network-adjacent client that reaches an SSR or SSG render failure through this development-only error path can obtain shell environment secrets. The renderer escaped only one exact lowercase script closing-tag spelling, so case variants and valid closing-tag delimiter variants in reflected diagnostic data could terminate the script element and inject markup; executing the injected code in a developer browser additionally requires the payload to accompany that developer's request. This issue is fixed in @quasar/render-ssr-error 2.2.4 and @quasar/app-vite 3.3.0."}],"affected":[{"vendor":"quasarframework","product":"quasar","versions":[{"version":"< 2.23.3","status":"affected"}]},{"vendor":"@quasar","product":"render-ssr-error","versions":[{"version":"< 2.2.4","status":"affected"}]},{"vendor":"@quasar","product":"app-vite","versions":[{"version":"< 3.3.0","status":"affected"}]}],"references":[{"url":"https://github.com/quasarframework/quasar/security/advisories/GHSA-r5mf-4r5x-q78f","name":"https://github.com/quasarframework/quasar/security/advisories/GHSA-r5mf-4r5x-q78f","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/quasarframework/quasar/commit/61c2bd8a607785fdade72cce20e8faf1de7eee15","name":"https://github.com/quasarframework/quasar/commit/61c2bd8a607785fdade72cce20e8faf1de7eee15","tags":["x_refsource_MISC"]},{"url":"https://github.com/quasarframework/quasar/releases/tag/@quasar/app-vite-v3.3.0","name":"https://github.com/quasarframework/quasar/releases/tag/@quasar/app-vite-v3.3.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"ADJACENT","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:H/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"}]},{"descriptions":[{"cweId":"CWE-497","lang":"en","description":"CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-06T17:24:07.788Z"},"source":{"advisory":"GHSA-r5mf-4r5x-q78f","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/quasarframework/quasar/security/advisories/GHSA-r5mf-4r5x-q78f","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-06T18:22:31.217011Z","id":"CVE-2026-106106","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-06T18:22:44.948Z"}}]}}}