CVE-2026-82642

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In versions prior to 0.11.16, EPUB chapter HTML is sanitized with DOMPurify using a configuration that forbade only the <script> tag (FORBID_TAGS: ['script']) in apps/readest-app/src/services/transformers/sanitizer.ts. DOMPurify does not parse the contents of the srcdoc attribute on <iframe> elements, treating it as an opaque string attribute, so an attacker who can get an <iframe> element to survive sanitization can embed a complete HTML document containing a <script> tag inside srcdoc and have it execute when the browser renders the iframe. The content iframe is configured with sandbox=\"allow-same-origin allow-scripts\", so script executing inside it shares the parent origin and can reach parent.parent.__TAURI_INTERNALS__.invoke(...), giving access to every Tauri IPC command the application is permitted to use, which escalates to arbitrary code execution. The payload can be made invisible (zero-size, transparent iframe) so the reader sees only normal book text. Version 0.11.16 hardened the sanitizer configuration by adding 'iframe', 'object' and 'embed' to FORBID_TAGS and adding 'srcdoc' to FORBID_ATTR.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Readest is an open-source e-book reader built on Tauri. In versions prior to 0.11.16, EPUB chapter HTML is sanitized with DOMPurify using a configuration that forbade only the &lt;script&gt; tag (FORBID_TAGS: ['script']) in apps/readest-app/src/services/transformers/sanitizer.ts. DOMPurify does not parse the contents of the srcdoc attribute on &lt;iframe&gt; elements, treating it as an opaque string attribute, so an attacker who can get an &lt;iframe&gt; element to survive sanitization can embed a complete HTML document containing a &lt;script&gt; tag inside srcdoc and have it execute when the browser renders the iframe. The content iframe is configured with sandbox=\"allow-same-origin allow-scripts\", so script executing inside it shares the parent origin and can reach parent.parent.__TAURI_INTERNALS__.invoke(...), giving access to every Tauri IPC command the application is permitted to use, which escalates to arbitrary code execution. The payload can be made invisible (zero-size, transparent iframe) so the reader sees only normal book text. Version 0.11.16 hardened the sanitizer configuration by adding 'iframe', 'object' and 'embed' to FORBID_TAGS and adding 'srcdoc' to FORBID_ATTR.</p>"}]}], "references": [{"url": "https://github.com/readest/readest/security/advisories/GHSA-p4x7-pf2c-xrvj", "name": "GHSA-p4x7-pf2c-xrvj", "tags": ["vendor-advisory"]}, {"url": "https://github.com/readest/readest/pull/4762", "name": "PR #4762", "tags": ["patch"]}, {"url": "https://github.com/readest/readest/commit/005aa2d6157a34049bf45641c06861d606a85edb", "name": "Fix commit 005aa2d6157a", "tags": ["patch"]}, {"url": "https://github.com/readest/readest/releases/tag/v0.11.16", "name": "Release v0.11.16 (first fixed release)", "tags": ["release-notes"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 8.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}}], "workarounds": [{"lang": "en", "value": "Only open EPUB files from trusted sources. Ensure the 'allow script' view setting remains disabled, as enabling it bypasses sanitization entirely.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Only open EPUB files from trusted sources. Ensure the 'allow script' view setting remains disabled, as enabling it bypasses sanitization entirely.</p>"}]}], "solutions": [{"lang": "en", "value": "Upgrade to Readest 0.11.16 or later. The fix adds 'srcdoc' to the DOMPurify FORBID_ATTR list and 'iframe', 'object' and 'embed' to FORBID_TAGS in apps/readest-app/src/services/transformers/sanitizer.ts.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Upgrade to Readest 0.11.16 or later. The fix adds 'srcdoc' to the DOMPurify FORBID_ATTR list and 'iframe', 'object' and 'embed' to FORBID_TAGS in apps/readest-app/src/services/transformers/sanitizer.ts.</p>"}]}], "timeline": [{"time": "2026-06-23T00:00:00.000Z", "lang": "en", "value": "Reported to the Readest maintainers"}, {"time": "2026-06-24T14:01:00.000Z", "lang": "en", "value": "Fix committed (005aa2d6157a, PR #4762)"}, {"time": "2026-06-28T18:51:00.000Z", "lang": "en", "value": "Fix released in v0.11.16"}], "credits": [{"lang": "en", "value": "Yuval Moravchick, JFrog Security Research", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-31T16:45:50.271180Z", "id": "CVE-2026-82642", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-31T16:45:59.286Z"}}]}}

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The fix adds 'srcdoc' to the DOMPurify FORBID_ATTR list and 'iframe', 'object' and 'embed' to FORBID_TAGS in apps/readest-app/src/services/transformers/sanitizer.ts.", "supportingMedia": [{"type": "text/html", "value": "<p>Upgrade to Readest 0.11.16 or later. The fix adds 'srcdoc' to the DOMPurify FORBID_ATTR list and 'iframe', 'object' and 'embed' to FORBID_TAGS in apps/readest-app/src/services/transformers/sanitizer.ts.</p>", "base64": false}]}], "references": [{"url": "https://github.com/readest/readest/security/advisories/GHSA-p4x7-pf2c-xrvj", "name": "GHSA-p4x7-pf2c-xrvj", "tags": ["vendor-advisory"]}, {"url": "https://github.com/readest/readest/pull/4762", "name": "PR #4762", "tags": ["patch"]}, {"url": "https://github.com/readest/readest/commit/005aa2d6157a34049bf45641c06861d606a85edb", "name": "Fix commit 005aa2d6157a", "tags": ["patch"]}, {"url": "https://github.com/readest/readest/releases/tag/v0.11.16", "name": "Release v0.11.16 (first fixed release)", "tags": ["release-notes"]}], "workarounds": [{"lang": "en", "value": "Only open EPUB files from trusted sources. Ensure the 'allow script' view setting remains disabled, as enabling it bypasses sanitization entirely.", "supportingMedia": [{"type": "text/html", "value": "<p>Only open EPUB files from trusted sources. Ensure the 'allow script' view setting remains disabled, as enabling it bypasses sanitization entirely.</p>", "base64": false}]}], "x_generator": {"engine": "Vulnogram 1.0.5"}, "descriptions": [{"lang": "en", "value": "Readest is an open-source e-book reader built on Tauri. In versions prior to 0.11.16, EPUB chapter HTML is sanitized with DOMPurify using a configuration that forbade only the <script> tag (FORBID_TAGS: ['script']) in apps/readest-app/src/services/transformers/sanitizer.ts. DOMPurify does not parse the contents of the srcdoc attribute on <iframe> elements, treating it as an opaque string attribute, so an attacker who can get an <iframe> element to survive sanitization can embed a complete HTML document containing a <script> tag inside srcdoc and have it execute when the browser renders the iframe. The content iframe is configured with sandbox=\"allow-same-origin allow-scripts\", so script executing inside it shares the parent origin and can reach parent.parent.__TAURI_INTERNALS__.invoke(...), giving access to every Tauri IPC command the application is permitted to use, which escalates to arbitrary code execution. The payload can be made invisible (zero-size, transparent iframe) so the reader sees only normal book text. Version 0.11.16 hardened the sanitizer configuration by adding 'iframe', 'object' and 'embed' to FORBID_TAGS and adding 'srcdoc' to FORBID_ATTR.", "supportingMedia": [{"type": "text/html", "value": "<p>Readest is an open-source e-book reader built on Tauri. In versions prior to 0.11.16, EPUB chapter HTML is sanitized with DOMPurify using a configuration that forbade only the &lt;script&gt; tag (FORBID_TAGS: ['script']) in apps/readest-app/src/services/transformers/sanitizer.ts. DOMPurify does not parse the contents of the srcdoc attribute on &lt;iframe&gt; elements, treating it as an opaque string attribute, so an attacker who can get an &lt;iframe&gt; element to survive sanitization can embed a complete HTML document containing a &lt;script&gt; tag inside srcdoc and have it execute when the browser renders the iframe. The content iframe is configured with sandbox=\"allow-same-origin allow-scripts\", so script executing inside it shares the parent origin and can reach parent.parent.__TAURI_INTERNALS__.invoke(...), giving access to every Tauri IPC command the application is permitted to use, which escalates to arbitrary code execution. The payload can be made invisible (zero-size, transparent iframe) so the reader sees only normal book text. Version 0.11.16 hardened the sanitizer configuration by adding 'iframe', 'object' and 'embed' to FORBID_TAGS and adding 'srcdoc' to FORBID_ATTR.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "providerMetadata": {"orgId": "48a46f29-ae42-4e1d-90dd-c1676c1e5e6d", "shortName": "JFROG", "dateUpdated": "2026-08-30T13:44:34.109Z"}}}, "cveMetadata": {"cveId": "CVE-2026-82642", "state": "PUBLISHED", "dateUpdated": "2026-08-31T16:45:59.286Z", "dateReserved": "2026-08-30T13:32:39.506Z", "assignerOrgId": "48a46f29-ae42-4e1d-90dd-c1676c1e5e6d", "datePublished": "2026-08-30T13:44:34.109Z", "assignerShortName": "JFROG"}, "dataVersion": "5.2"}

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{}

{"affected": [{"configurations": [{"platform": ["windows", "macos", "linux"], "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.11.16)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "readest", "source": "cna", "vendor": "readest"}, "product": "readest", "vendor": "readest"}], "created": "2026-08-30T15:30:18.060022+00:00", "updated": "2026-08-31T11:19:03.625987+00:00", "vendors": ["readest", "readest$PRODUCT$readest"]}