CVE-2026-82287

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-28. a secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: None knownExposed: 0

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

Rybbit before 2.7.0 contains a CORS misconfiguration vulnerability that allows attackers to bypass origin restrictions by reflecting any request origin in Access-Control-Allow-Origin responses while credentials are enabled. Attackers can issue credentialed cross-origin requests from any website to read analytics data, account information, and perform authenticated state-changing operations as the victim user.

CVSS v3
8.1
EG Score
8.1(high)
EG Risk
52(Track)
EG Risk 52/100SSVC: 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
Severity81% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

August 28, 2026

Last Modified

August 31, 2026

Advisory Details (5)

Auto-updated Aug 28, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit.
generic

Rybbit Reflects Any Origin in CORS Responses While Allowing Credentials | Advisories | VulnCheck

https://www.vulncheck.com/advisories/rybbit-reflects-any-origin-in-cors-responses-while-allowing-credentials
github_commit Patch Available

commit 6f1039bdd332 (rybbit-io/rybbit)

Patch available: rybbit-io/rybbit v2.7.0 (contains commit 6f1039bdd332)

https://github.com/rybbit-io/rybbit/commit/6f1039bdd3328a84d6700031bc0ce4714020e2f9
generic

rybbit/server/src/index.ts at v2.6.0 · rybbit-io/rybbit · GitHub

https://github.com/rybbit-io/rybbit/blob/v2.6.0/server/src/index.ts
generic

GitHub - rybbit-io/rybbit: 🐸 Rybbit - open-source and privacy-friendly alternative to Google Analytics that is 10x more intuitive. · GitHub

https://github.com/rybbit-io/rybbit
generic🟡 PoC Available

CORS misconfiguration + SameSite=None cookies enable cross-origin CSRF · Issue #1038 · rybbit-io/rybbit · GitHub

https://github.com/rybbit-io/rybbit/issues/1038

Vendor Advisories for CVE-2026-82287(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 / 90× 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.

  1. 2026-09-19 07:22 UTCGHSA enrichment
  2. 2026-09-18 19:53 UTCEG score recompute
  3. 2026-09-18 19:53 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 08:23 UTCGHSA enrichment
  6. 2026-09-17 20:50 UTCEG score recompute
  7. 2026-09-17 20:50 UTCGHSA enrichment
  8. 2026-09-17 06:47 UTCGHSA enrichment
  9. 2026-09-16 18:58 UTCEG score recompute
  10. 2026-09-16 18:58 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 05:57 UTCEG score recompute
  13. 2026-09-16 05:57 UTCGHSA enrichment
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-15 18:28 UTCGHSA enrichment
  16. 2026-09-15 06:54 UTCEG score recompute
  17. 2026-09-15 06:54 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-14 19:24 UTCGHSA enrichment
  21. 2026-09-14 07:53 UTCGHSA enrichment
  22. 2026-09-13 20:23 UTCEG score recompute
  23. 2026-09-13 20:23 UTCGHSA enrichment
  24. 2026-09-13 08:52 UTCGHSA enrichment
  25. 2026-09-12 21:23 UTCEG score recompute
Show 65 more
  1. 2026-09-12 21:23 UTCGHSA enrichment
  2. 2026-09-12 09:53 UTCGHSA enrichment
  3. 2026-09-11 22:24 UTCEG score recompute
  4. 2026-09-11 22:23 UTCGHSA enrichment
  5. 2026-09-11 14:53 UTCEPSS rescore
  6. 2026-09-11 14:53 UTCEPSS rescore
  7. 2026-09-11 10:51 UTCEG score recompute
  8. 2026-09-11 10:51 UTCGHSA enrichment
  9. 2026-09-10 23:17 UTCGHSA enrichment
  10. 2026-09-10 11:47 UTCEG score recompute
  11. 2026-09-10 11:47 UTCGHSA enrichment
  12. 2026-09-09 23:52 UTCGHSA enrichment
  13. 2026-09-09 11:57 UTCGHSA enrichment
  14. 2026-09-09 00:27 UTCEG score recompute
  15. 2026-09-09 00:27 UTCGHSA enrichment
  16. 2026-09-08 22:01 UTCEPSS rescore
  17. 2026-09-08 03:16 UTCEG score recompute
  18. 2026-09-08 03:16 UTCGHSA enrichment
  19. 2026-09-07 15:45 UTCGHSA enrichment
  20. 2026-09-07 04:16 UTCGHSA enrichment
  21. 2026-09-06 16:45 UTCEG score recompute
  22. 2026-09-06 16:45 UTCGHSA enrichment
  23. 2026-09-06 13:48 UTCEPSS rescore
  24. 2026-09-06 05:14 UTCGHSA enrichment
  25. 2026-09-05 17:44 UTCEG score recompute
  26. 2026-09-05 17:44 UTCGHSA enrichment
  27. 2026-09-05 15:31 UTCEPSS rescore
  28. 2026-09-05 06:14 UTCGHSA enrichment
  29. 2026-09-04 18:44 UTCEG score recompute
  30. 2026-09-04 18:44 UTCGHSA enrichment
  31. 2026-09-04 07:08 UTCEG score recompute
  32. 2026-09-04 07:08 UTCGHSA enrichment
  33. 2026-09-04 05:07 UTCEPSS rescore
  34. 2026-09-03 19:30 UTCGHSA enrichment
  35. 2026-09-03 07:55 UTCGHSA enrichment
  36. 2026-09-02 20:24 UTCEG score recompute
  37. 2026-09-02 20:24 UTCGHSA enrichment
  38. 2026-09-02 14:12 UTCEPSS rescore
  39. 2026-09-02 06:03 UTCGHSA enrichment
  40. 2026-09-01 18:32 UTCEG score recompute
  41. 2026-09-01 18:32 UTCGHSA enrichment
  42. 2026-09-01 13:54 UTCEPSS rescore
  43. 2026-09-01 07:01 UTCEG score recompute
  44. 2026-09-01 07:01 UTCGHSA enrichment
  45. 2026-09-01 04:40 UTCEPSS rescore
  46. 2026-09-01 04:40 UTCEPSS rescore
  47. 2026-08-31 19:31 UTCEG score recompute
  48. 2026-08-31 19:31 UTCGHSA enrichment
  49. 2026-08-31 19:08 UTCEG score recompute
  50. 2026-08-31 19:08 UTCGHSA enrichment
  51. 2026-08-31 17:29 UTCGHSA enrichment
  52. 2026-08-31 05:57 UTCEG score recompute
  53. 2026-08-31 05:57 UTCGHSA enrichment
  54. 2026-08-30 19:18 UTCEPSS rescore
  55. 2026-08-30 19:17 UTCEPSS rescore
  56. 2026-08-30 18:28 UTCGHSA enrichment
  57. 2026-08-30 06:58 UTCEG score recompute
  58. 2026-08-30 06:58 UTCGHSA enrichment
  59. 2026-08-30 01:22 UTCEPSS rescore
  60. 2026-08-29 19:28 UTCGHSA enrichment
  61. 2026-08-29 07:58 UTCEG score recompute
  62. 2026-08-29 07:58 UTCGHSA enrichment
  63. 2026-08-28 20:25 UTCEG score recompute
  64. 2026-08-28 19:39 UTCEG score recompute
  65. 2026-08-28 19:36 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-82287?
CVE-2026-82287 is a high vulnerability published on August 28, 2026. Rybbit before 2.7.0 contains a CORS misconfiguration vulnerability that allows attackers to bypass origin restrictions by reflecting any request origin in Access-Control-Allow-Origin responses while credentials are enabled. Attackers can issue credentialed cross-origin requests from any website to…
When was CVE-2026-82287 disclosed?
CVE-2026-82287 was first published in the National Vulnerability Database on August 28, 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-2026-82287 actively exploited?
CVE-2026-82287 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 79.1% of all scored CVEs.
What is the CVSS score of CVE-2026-82287?
CVE-2026-82287 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-82287?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82287, 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.

Dependency Blast Radius

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