CVE-2026-82454

CRITICALPre-NVD 9.19.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 9.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
9.1CRITICALmedium confidence
EG Risk
56
EG Risk 56/100

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 (value × EchelonGraph’s weight)
Severity91% × 45%
The EG Score, 9.1 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
30th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 29, 2026

Last Modified

September 24, 2026

Advisory Details (4)

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

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 pull request 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
Web page

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 28× in last 7d / 203× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 330 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 230 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 01:34 UTCEG score recompute
  2. 2026-10-14 01:34 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  3. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  4. 2026-10-12 21:45 UTCEG score recompute
  5. 2026-10-12 21:45 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  6. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  7. 2026-10-12 14:55 UTCEG score recompute
  8. 2026-10-12 05:19 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  9. 2026-10-11 19:19 UTCEG score recompute
  10. 2026-10-11 16:36 UTCEG score recompute
  11. 2026-10-11 13:54 UTCEG score recompute
  12. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  13. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  14. 2026-10-10 13:37 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  15. 2026-10-10 09:35 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  16. 2026-10-10 05:14 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  17. 2026-10-10 00:45 UTCEG score recompute
  18. 2026-10-10 00:45 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  19. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  20. 2026-10-09 06:50 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  21. 2026-10-09 02:34 UTCEG score recompute
  22. 2026-10-09 02:34 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  23. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  24. 2026-10-08 08:33 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  25. 2026-10-08 04:39 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
Show 75 more
  1. 2026-10-08 00:46 UTCEG score recompute
  2. 2026-10-08 00:45 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  3. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  4. 2026-10-07 07:40 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  5. 2026-10-07 03:46 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  6. 2026-10-06 23:42 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  7. 2026-10-06 19:48 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  8. 2026-10-06 15:54 UTCEG score recompute
  9. 2026-10-06 15:54 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  10. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  11. 2026-10-06 11:21 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  12. 2026-10-06 07:27 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  13. 2026-10-06 00:47 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  14. 2026-10-05 20:42 UTCEG score recompute
  15. 2026-10-05 20:42 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  17. 2026-10-05 16:49 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  18. 2026-10-05 11:27 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  19. 2026-10-05 07:32 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  20. 2026-10-05 03:38 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  21. 2026-10-04 23:29 UTCEG score recompute
  22. 2026-10-04 23:29 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  23. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  24. 2026-10-04 19:35 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  25. 2026-10-04 13:22 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  26. 2026-10-04 09:12 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  27. 2026-10-04 05:17 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  28. 2026-10-04 01:23 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  29. 2026-10-03 21:24 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  30. 2026-10-03 17:29 UTCEG score recompute
  31. 2026-10-03 17:29 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  32. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  33. 2026-10-03 13:36 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  34. 2026-10-03 05:38 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  35. 2026-10-03 01:44 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  36. 2026-10-02 21:50 UTCEG score recompute
  37. 2026-10-02 21:50 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  38. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  39. 2026-10-02 17:55 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  40. 2026-10-02 14:02 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  41. 2026-10-02 10:08 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  42. 2026-10-02 06:14 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  43. 2026-10-02 00:36 UTCEG score recompute
  44. 2026-10-02 00:36 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  45. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  46. 2026-10-01 19:48 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  47. 2026-10-01 13:12 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  48. 2026-10-01 09:18 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  49. 2026-10-01 05:24 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  50. 2026-10-01 00:58 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  51. 2026-09-30 19:48 UTCEG score recompute
  52. 2026-09-30 19:48 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  53. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  54. 2026-09-30 11:40 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  55. 2026-09-30 07:46 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  56. 2026-09-30 03:48 UTCEG score recompute
  57. 2026-09-30 03:48 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  58. 2026-09-29 12:42 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  59. 2026-09-29 08:48 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  60. 2026-09-29 04:55 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  61. 2026-09-29 01:01 UTCEG score recompute
  62. 2026-09-29 01:01 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  63. 2026-09-28 21:07 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  64. 2026-09-28 15:46 UTCEG score recompute
  65. 2026-09-28 15:46 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  66. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  67. 2026-09-28 11:31 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  68. 2026-09-28 07:37 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  69. 2026-09-28 03:44 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  70. 2026-09-27 23:47 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  71. 2026-09-27 19:48 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  72. 2026-09-27 15:53 UTCEG score recompute
  73. 2026-09-27 15:53 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1
  74. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  75. 2026-09-27 11:56 UTCGHSA enrichmentGHSA-8fpq-5wcx-76h3 · GitHub severity CRITICAL · GitHub CVSS 9.1

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-82454?
CVE-2026-82454 is a critical-severity vulnerability; its CVE record was 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 made public?
CVE-2026-82454 was made public on August 25, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 29, 2026. EchelonGraph's copy of the record carries a last-modified date of September 24, 2026; the record at its source may have been updated since.
Is CVE-2026-82454 actively exploited?
CVE-2026-82454 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (30th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-82454?
CVE-2026-82454 has a CVSS base score of 9.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-82454?
A fix for CVE-2026-82454 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-82454 are linked in the Vendor Advisories panel on this page.

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