CVE-2026-82454

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-29. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

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

The Omnivore API (packages/api) before the fix in commit abf53d6 contains an authentication bypass in Apple sign-in token verification. The decodeAppleToken function extracted the 'alg' field from the attacker-supplied JWT header and passed it as the sole allowed algorithm to jwt.verify(). Using jsonwebtoken v8 (which does not validate key/algorithm compatibility), an attacker can set alg=HS256 and sign a forged token using Apple's publicly available RSA public key as the HMAC secret, bypassing signature verification and impersonating any Apple-linked account.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

August 29, 2026

Last Modified

September 17, 2026

Advisory Details (4)

Auto-updated Sep 15, 2026
Patch available. Sources: github_commit, github_pr.
generic

Omnivore before android-0.227.0 Authentication Bypass via Apple Sign-in | Advisories | VulnCheck

https://www.vulncheck.com/advisories/omnivore-before-android-0.227.0-authentication-bypass-via-apple-sign-in
github_pr Patch Available

fix: hardcode RS256 in Apple JWT verification to prevent algorithm co…

Patch available: omnivore-app/omnivore android-0.227.0 (PR #4652 merged 2026-08-25)

https://github.com/omnivore-app/omnivore/pull/4652
github_commit Patch Available

commit abf53d650875 (omnivore-app/omnivore)

Patch available: omnivore-app/omnivore android-0.227.0 (contains commit abf53d650875)

https://github.com/omnivore-app/omnivore/commit/abf53d6508755d3d22a994e28e370a9193ea977a
generic

GitHub - omnivore-app/omnivore: Omnivore is a complete, open source read-it-later solution for people who like reading. · GitHub

https://github.com/omnivore-app/omnivore

Vendor Advisories for CVE-2026-82454(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 57× in last 7d / 174× 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 174 total refreshes for this CVE.

  1. 2026-09-19 21:58 UTCGHSA enrichment
  2. 2026-09-19 18:03 UTCEG score recompute
  3. 2026-09-19 18:03 UTCGHSA enrichment
  4. 2026-09-19 14:09 UTCGHSA enrichment
  5. 2026-09-19 10:00 UTCGHSA enrichment
  6. 2026-09-19 05:34 UTCGHSA enrichment
  7. 2026-09-19 01:40 UTCGHSA enrichment
  8. 2026-09-18 21:45 UTCEG score recompute
  9. 2026-09-18 21:45 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 17:51 UTCGHSA enrichment
  12. 2026-09-18 13:57 UTCGHSA enrichment
  13. 2026-09-18 10:02 UTCGHSA enrichment
  14. 2026-09-18 06:08 UTCGHSA enrichment
  15. 2026-09-18 02:14 UTCGHSA enrichment
  16. 2026-09-17 22:20 UTCEG score recompute
  17. 2026-09-17 22:20 UTCGHSA enrichment
  18. 2026-09-17 18:26 UTCEG score recompute
  19. 2026-09-17 18:26 UTCGHSA enrichment
  20. 2026-09-17 18:13 UTCEG score recompute
  21. 2026-09-17 18:13 UTCGHSA enrichment
  22. 2026-09-17 14:49 UTCGHSA enrichment
  23. 2026-09-17 10:55 UTCGHSA enrichment
  24. 2026-09-17 07:01 UTCGHSA enrichment
  25. 2026-09-17 03:07 UTCGHSA enrichment
Show 75 more
  1. 2026-09-16 22:53 UTCGHSA enrichment
  2. 2026-09-16 18:57 UTCGHSA enrichment
  3. 2026-09-16 15:04 UTCEG score recompute
  4. 2026-09-16 15:04 UTCGHSA enrichment
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 11:10 UTCGHSA enrichment
  7. 2026-09-16 07:17 UTCEG score recompute
  8. 2026-09-16 07:17 UTCGHSA enrichment
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-16 03:23 UTCGHSA enrichment
  11. 2026-09-15 23:28 UTCGHSA enrichment
  12. 2026-09-15 19:03 UTCGHSA enrichment
  13. 2026-09-15 15:07 UTCGHSA enrichment
  14. 2026-09-15 11:04 UTCGHSA enrichment
  15. 2026-09-15 06:27 UTCEG score recompute
  16. 2026-09-15 06:26 UTCGHSA enrichment
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 02:33 UTCGHSA enrichment
  20. 2026-09-14 22:39 UTCGHSA enrichment
  21. 2026-09-14 18:45 UTCGHSA enrichment
  22. 2026-09-14 14:28 UTCGHSA enrichment
  23. 2026-09-14 10:34 UTCGHSA enrichment
  24. 2026-09-14 06:37 UTCGHSA enrichment
  25. 2026-09-14 02:43 UTCGHSA enrichment
  26. 2026-09-13 22:49 UTCGHSA enrichment
  27. 2026-09-13 18:55 UTCEG score recompute
  28. 2026-09-13 18:55 UTCGHSA enrichment
  29. 2026-09-13 14:55 UTCGHSA enrichment
  30. 2026-09-13 10:45 UTCGHSA enrichment
  31. 2026-09-13 06:51 UTCGHSA enrichment
  32. 2026-09-13 02:50 UTCGHSA enrichment
  33. 2026-09-12 22:56 UTCGHSA enrichment
  34. 2026-09-12 19:02 UTCGHSA enrichment
  35. 2026-09-12 15:08 UTCEG score recompute
  36. 2026-09-12 15:08 UTCGHSA enrichment
  37. 2026-09-12 11:14 UTCGHSA enrichment
  38. 2026-09-12 07:20 UTCGHSA enrichment
  39. 2026-09-12 03:26 UTCGHSA enrichment
  40. 2026-09-11 23:32 UTCGHSA enrichment
  41. 2026-09-11 19:38 UTCGHSA enrichment
  42. 2026-09-11 15:44 UTCEG score recompute
  43. 2026-09-11 15:44 UTCGHSA enrichment
  44. 2026-09-11 14:53 UTCEPSS rescore
  45. 2026-09-11 14:53 UTCEPSS rescore
  46. 2026-09-11 11:48 UTCEG score recompute
  47. 2026-09-11 11:48 UTCGHSA enrichment
  48. 2026-09-11 07:45 UTCGHSA enrichment
  49. 2026-09-11 03:51 UTCGHSA enrichment
  50. 2026-09-10 23:57 UTCGHSA enrichment
  51. 2026-09-10 19:33 UTCGHSA enrichment
  52. 2026-09-10 15:39 UTCGHSA enrichment
  53. 2026-09-10 11:45 UTCEG score recompute
  54. 2026-09-10 11:45 UTCGHSA enrichment
  55. 2026-09-10 07:39 UTCGHSA enrichment
  56. 2026-09-10 03:45 UTCGHSA enrichment
  57. 2026-09-09 23:51 UTCGHSA enrichment
  58. 2026-09-09 16:07 UTCGHSA enrichment
  59. 2026-09-09 12:07 UTCGHSA enrichment
  60. 2026-09-09 08:13 UTCGHSA enrichment
  61. 2026-09-09 04:19 UTCGHSA enrichment
  62. 2026-09-09 00:25 UTCEG score recompute
  63. 2026-09-09 00:25 UTCGHSA enrichment
  64. 2026-09-08 22:01 UTCEPSS rescore
  65. 2026-09-08 11:04 UTCGHSA enrichment
  66. 2026-09-08 06:38 UTCGHSA enrichment
  67. 2026-09-08 02:41 UTCGHSA enrichment
  68. 2026-09-07 22:48 UTCGHSA enrichment
  69. 2026-09-07 18:54 UTCEG score recompute
  70. 2026-09-07 18:54 UTCGHSA enrichment
  71. 2026-09-07 15:01 UTCGHSA enrichment
  72. 2026-09-07 10:17 UTCGHSA enrichment
  73. 2026-09-07 06:22 UTCGHSA enrichment
  74. 2026-09-07 02:24 UTCGHSA enrichment
  75. 2026-09-06 22:24 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-82454?
CVE-2026-82454 is a critical vulnerability published on August 29, 2026. The Omnivore API (packages/api) before the fix in commit abf53d6 contains an authentication bypass in Apple sign-in token verification. The decodeAppleToken function extracted the 'alg' field from the attacker-supplied JWT header and passed it as the sole allowed algorithm to jwt.verify(). Using…
When was CVE-2026-82454 disclosed?
CVE-2026-82454 was first published in the National Vulnerability Database on August 29, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82454 actively exploited?
CVE-2026-82454 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 85.4% of all scored CVEs.
What is the CVSS score of CVE-2026-82454?
CVE-2026-82454 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-82454?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82454, 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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