CVE-2026-82642

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-30. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 tag (FORBID_TAGS: ['script']) in apps/readest-app/src/services/transformers/sanitizer.ts. DOMPurify does not parse the contents of the srcdoc attribute on elements, treating it as an opaque string attribute, so an attacker who can get an element to survive sanitization can embed a complete HTML document containing a 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.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

August 30, 2026

Last Modified

August 31, 2026

Advisory Details (3)

Auto-updated Aug 30, 2026
Patch available. Sources: github_pr, github_commit, github_release.
github_release Patch Available

Readest 0.11.16

Patch available: readest/readest v0.11.16 (pre-release)

https://github.com/readest/readest/releases/tag/v0.11.16
github_commit

commit 005aa2d6157a (readest/readest)

Fix landed in readest/readest commit 005aa2d6157a — awaiting tagged release

https://github.com/readest/readest/commit/005aa2d6157a34049bf45641c06861d606a85edb
github_pr

fix(security): iframe srcdoc atrribute can lead to XSS attack

Fix merged in readest/readest PR #4762 on 2026-06-24 — awaiting tagged release

https://github.com/readest/readest/pull/4762

Vendor Advisories for CVE-2026-82642(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 27× in last 7d / 105× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 105 total refreshes for this CVE.

  1. 2026-09-25 01:56 UTCGHSA enrichment
  2. 2026-09-24 14:29 UTCEG score recompute
  3. 2026-09-24 14:29 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 02:35 UTCEG score recompute
  6. 2026-09-24 02:35 UTCGHSA enrichment
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-23 15:09 UTCGHSA enrichment
  9. 2026-09-23 03:42 UTCGHSA enrichment
  10. 2026-09-22 16:16 UTCEG score recompute
  11. 2026-09-22 16:16 UTCGHSA enrichment
  12. 2026-09-22 16:01 UTCEPSS rescore
  13. 2026-09-22 04:43 UTCEG score recompute
  14. 2026-09-22 04:43 UTCGHSA enrichment
  15. 2026-09-21 21:09 UTCEPSS rescore
  16. 2026-09-21 17:16 UTCGHSA enrichment
  17. 2026-09-21 05:11 UTCEG score recompute
  18. 2026-09-21 05:10 UTCGHSA enrichment
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-20 17:42 UTCGHSA enrichment
  21. 2026-09-20 06:02 UTCGHSA enrichment
  22. 2026-09-19 18:36 UTCEG score recompute
  23. 2026-09-19 18:36 UTCGHSA enrichment
  24. 2026-09-19 07:09 UTCGHSA enrichment
  25. 2026-09-18 19:42 UTCEG score recompute
Show 75 more
  1. 2026-09-18 19:42 UTCGHSA enrichment
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 08:16 UTCGHSA enrichment
  4. 2026-09-17 20:49 UTCEG score recompute
  5. 2026-09-17 20:49 UTCGHSA enrichment
  6. 2026-09-17 06:20 UTCGHSA enrichment
  7. 2026-09-16 18:49 UTCEG score recompute
  8. 2026-09-16 18:48 UTCGHSA enrichment
  9. 2026-09-16 14:08 UTCEPSS rescore
  10. 2026-09-16 05:53 UTCEG score recompute
  11. 2026-09-16 05:53 UTCGHSA enrichment
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 18:27 UTCGHSA enrichment
  14. 2026-09-15 06:26 UTCEG score recompute
  15. 2026-09-15 06:25 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-14 18:59 UTCGHSA enrichment
  19. 2026-09-14 07:32 UTCGHSA enrichment
  20. 2026-09-13 20:06 UTCEG score recompute
  21. 2026-09-13 20:06 UTCGHSA enrichment
  22. 2026-09-13 08:39 UTCGHSA enrichment
  23. 2026-09-12 21:13 UTCEG score recompute
  24. 2026-09-12 21:13 UTCGHSA enrichment
  25. 2026-09-12 09:46 UTCGHSA enrichment
  26. 2026-09-11 22:20 UTCEG score recompute
  27. 2026-09-11 22:20 UTCGHSA enrichment
  28. 2026-09-11 14:53 UTCEPSS rescore
  29. 2026-09-11 14:53 UTCEPSS rescore
  30. 2026-09-11 10:50 UTCEG score recompute
  31. 2026-09-11 10:50 UTCGHSA enrichment
  32. 2026-09-10 23:11 UTCGHSA enrichment
  33. 2026-09-10 11:45 UTCEG score recompute
  34. 2026-09-10 11:44 UTCGHSA enrichment
  35. 2026-09-09 23:50 UTCGHSA enrichment
  36. 2026-09-09 11:04 UTCGHSA enrichment
  37. 2026-09-08 23:38 UTCEG score recompute
  38. 2026-09-08 23:37 UTCGHSA enrichment
  39. 2026-09-08 22:01 UTCEPSS rescore
  40. 2026-09-08 02:36 UTCEG score recompute
  41. 2026-09-08 02:36 UTCGHSA enrichment
  42. 2026-09-07 15:10 UTCGHSA enrichment
  43. 2026-09-07 03:43 UTCGHSA enrichment
  44. 2026-09-06 16:10 UTCEG score recompute
  45. 2026-09-06 16:10 UTCGHSA enrichment
  46. 2026-09-06 13:48 UTCEPSS rescore
  47. 2026-09-06 04:40 UTCGHSA enrichment
  48. 2026-09-05 17:14 UTCEG score recompute
  49. 2026-09-05 17:14 UTCGHSA enrichment
  50. 2026-09-05 15:31 UTCEPSS rescore
  51. 2026-09-05 05:48 UTCGHSA enrichment
  52. 2026-09-04 18:21 UTCEG score recompute
  53. 2026-09-04 18:21 UTCGHSA enrichment
  54. 2026-09-04 06:45 UTCEG score recompute
  55. 2026-09-04 06:45 UTCGHSA enrichment
  56. 2026-09-04 05:07 UTCEPSS rescore
  57. 2026-09-03 19:10 UTCGHSA enrichment
  58. 2026-09-03 07:43 UTCGHSA enrichment
  59. 2026-09-02 20:13 UTCEG score recompute
  60. 2026-09-02 20:13 UTCGHSA enrichment
  61. 2026-09-02 14:12 UTCEPSS rescore
  62. 2026-09-02 05:57 UTCGHSA enrichment
  63. 2026-09-01 18:30 UTCEG score recompute
  64. 2026-09-01 18:29 UTCGHSA enrichment
  65. 2026-09-01 13:54 UTCEPSS rescore
  66. 2026-09-01 07:01 UTCEG score recompute
  67. 2026-09-01 07:01 UTCGHSA enrichment
  68. 2026-09-01 04:40 UTCEPSS rescore
  69. 2026-09-01 04:40 UTCEPSS rescore
  70. 2026-08-31 19:31 UTCGHSA enrichment
  71. 2026-08-31 17:24 UTCEG score recompute
  72. 2026-08-31 17:24 UTCGHSA enrichment
  73. 2026-08-31 16:57 UTCEG score recompute
  74. 2026-08-31 16:57 UTCGHSA enrichment
  75. 2026-08-31 13:40 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-82642?
CVE-2026-82642 is a high vulnerability published on August 30, 2026. 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 (FORBIDTAGS: ['script']) in apps/readest-app/src/services/transformers/sanitizer.ts. DOMPurify does not parse…
When was CVE-2026-82642 disclosed?
CVE-2026-82642 was first published in the National Vulnerability Database on August 30, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82642 actively exploited?
CVE-2026-82642 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 50.4% of all scored CVEs.
What is the CVSS score of CVE-2026-82642?
CVE-2026-82642 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-82642?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82642, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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