CVE-2026-9733

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-23. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
9.1EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.1Exploit: None knownExposed services: Not assessed

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

Mojolicious::Plugin::Web::Auth::OAuth2 versions through 0.17 for Perl have an insecure default state parameter.

When no state generator is specified in the constructor, the module defaults to using a SHA-1 hash of predictable and low-entropy sources, including the epoch time (which is leaked via the HTTP Date header) and a call to Perl's built-in rand function.

A predictable state allows an attacker to hijack another user's session through cross site request forgery (CSRF).

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
Severity91% × 45%
Exploitation1% × 40%
Automatability100% × 15%
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

Published

June 23, 2026

Last Modified

June 23, 2026

Advisory Details (4)

Auto-updated Sep 16, 2026
No fix on record yet.
generic

oss-security - CVE-2026-9733: Mojolicious::Plugin::Web::Auth::OAuth2 versions through 0.17 for Perl have an insecure default state parameter

http://www.openwall.com/lists/oss-security/2026/06/23/1
generic

RFC 6749 - The OAuth 2.0 Authorization Framework

https://datatracker.ietf.org/doc/html/rfc6749#section-10.12

Vendor Advisories for CVE-2026-9733(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 36× 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 404 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-9733?
CVE-2026-9733 is a critical vulnerability published on June 23, 2026. Mojolicious::Plugin::Web::Auth::OAuth2 versions through 0.17 for Perl have an insecure default state parameter. When no state generator is specified in the constructor, the module defaults to using a SHA-1 hash of predictable and low-entropy sources, including the epoch time (which is leaked via…
When was CVE-2026-9733 disclosed?
CVE-2026-9733 was first published on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9733 actively exploited?
CVE-2026-9733 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-9733?
CVE-2026-9733 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-9733?
No fix for CVE-2026-9733 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-9733 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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