CVE-2026-82911

MEDIUMPre-NVD 5.15.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (12th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
5.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.1Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

Cross-Site Request Forgery (CSRF) in the OrderConfirmController at GET /order/confirm/{order_number} in Roskus Prospero Flow CRM before 5.15.11 allows an unauthenticated attacker to confirm any order on behalf of an authenticated user by directing them to a crafted page. Laravel's VerifyCsrfToken middleware enforces CSRF tokens only on POST, PUT, PATCH, and DELETE requests; the Route::get declaration leaves this state-changing action unprotected. Session cookies configured with SameSite=Lax are automatically included in top-level cross-site navigation, so a single link click triggers OrderConfirmController::confirm() and transitions the target order from pending to confirmed without user authorization. Because order numbers are sequential integers, an attacker can enumerate and confirm all existing orders in a single automated sweep.

CVSS v3
5.1
EG Score
5.1MEDIUMmedium confidence
EG Risk
23
EG Risk 23/100CISA SSVC

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
Severity51% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.2%
EPSS %ILE
12th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 4, 2026

Last Modified

September 9, 2026

Advisory Details (2)

Auto-updated Sep 4, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

CVE-2026-82911 · CSRF in Prospero Flow CRM order confirmation allows unauthorized order state changes | Vulnerabilities published by Secur0

https://secur0.com/en/cna/cve-list/cve-2026-82911-csrf-order-confirmation-prospero-flow-crm
github_commit

commit a90c0c8c (Roskus/prospero-flow-crm)

Fix landed in Roskus/prospero-flow-crm commit a90c0c8c — awaiting tagged release

https://github.com/Roskus/prospero-flow-crm/commit/a90c0c8c

Vendor Advisories for CVE-2026-82911(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 17× in last 7d / 69× 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. 2026-09-29 08:16 UTCEG score recompute
  2. 2026-09-29 08:16 UTCGHSA enrichment
  3. 2026-09-28 13:52 UTCEPSS rescore
  4. 2026-09-28 06:11 UTCEG score recompute
  5. 2026-09-28 06:11 UTCGHSA enrichment
  6. 2026-09-27 13:48 UTCEPSS rescore
  7. 2026-09-27 04:19 UTCEG score recompute
  8. 2026-09-27 04:19 UTCGHSA enrichment
  9. 2026-09-26 15:59 UTCEPSS rescore
  10. 2026-09-26 02:26 UTCEG score recompute
  11. 2026-09-26 02:26 UTCGHSA enrichment
  12. 2026-09-24 19:27 UTCEG score recompute
  13. 2026-09-24 19:27 UTCGHSA enrichment
  14. 2026-09-24 14:04 UTCEPSS rescore
  15. 2026-09-23 17:54 UTCEPSS rescore
  16. 2026-09-23 17:34 UTCEG score recompute
  17. 2026-09-23 17:34 UTCGHSA enrichment
  18. 2026-09-22 16:01 UTCEPSS rescore
  19. 2026-09-22 15:41 UTCEG score recompute
  20. 2026-09-22 15:41 UTCGHSA enrichment
  21. 2026-09-21 21:09 UTCEPSS rescore
  22. 2026-09-21 13:47 UTCEG score recompute
  23. 2026-09-21 13:47 UTCGHSA enrichment
  24. 2026-09-20 20:16 UTCEPSS rescore
  25. 2026-09-20 11:55 UTCEG score recompute
Show 44 more
  1. 2026-09-20 11:55 UTCGHSA enrichment
  2. 2026-09-19 09:55 UTCEG score recompute
  3. 2026-09-19 09:55 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 07:29 UTCEG score recompute
  6. 2026-09-18 07:29 UTCGHSA enrichment
  7. 2026-09-17 05:36 UTCEG score recompute
  8. 2026-09-17 05:36 UTCGHSA enrichment
  9. 2026-09-16 14:08 UTCEPSS rescore
  10. 2026-09-16 05:15 UTCEPSS rescore
  11. 2026-09-16 03:43 UTCEG score recompute
  12. 2026-09-16 03:43 UTCGHSA enrichment
  13. 2026-09-15 03:12 UTCEPSS rescore
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-15 01:50 UTCGHSA enrichment
  16. 2026-09-13 23:58 UTCEG score recompute
  17. 2026-09-13 23:58 UTCGHSA enrichment
  18. 2026-09-12 22:05 UTCEG score recompute
  19. 2026-09-12 22:05 UTCGHSA enrichment
  20. 2026-09-11 20:10 UTCEG score recompute
  21. 2026-09-11 20:10 UTCGHSA enrichment
  22. 2026-09-11 14:53 UTCEPSS rescore
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-10 18:01 UTCEG score recompute
  25. 2026-09-10 18:01 UTCGHSA enrichment
  26. 2026-09-09 16:09 UTCGHSA enrichment
  27. 2026-09-09 03:59 UTCEG score recompute
  28. 2026-09-09 03:59 UTCGHSA enrichment
  29. 2026-09-08 22:01 UTCEPSS rescore
  30. 2026-09-08 02:06 UTCEG score recompute
  31. 2026-09-08 02:06 UTCGHSA enrichment
  32. 2026-09-07 00:14 UTCEG score recompute
  33. 2026-09-07 00:14 UTCGHSA enrichment
  34. 2026-09-06 13:48 UTCEPSS rescore
  35. 2026-09-05 22:18 UTCEG score recompute
  36. 2026-09-05 22:17 UTCGHSA enrichment
  37. 2026-09-05 15:31 UTCEPSS rescore
  38. 2026-09-04 20:24 UTCEG score recompute
  39. 2026-09-04 20:24 UTCGHSA enrichment
  40. 2026-09-04 19:40 UTCEG score recompute
  41. 2026-09-04 19:40 UTCGHSA enrichment
  42. 2026-09-04 16:24 UTCEG score recompute
  43. 2026-09-04 15:44 UTCEG score recompute
  44. 2026-09-04 15:44 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-82911?
CVE-2026-82911 is a medium vulnerability published on September 4, 2026. Cross-Site Request Forgery (CSRF) in the OrderConfirmController at GET /order/confirm/{order_number} in Roskus Prospero Flow CRM before 5.15.11 allows an unauthenticated attacker to confirm any order on behalf of an authenticated user by directing them to a crafted page. Laravel's VerifyCsrfToken…
When was CVE-2026-82911 disclosed?
CVE-2026-82911 was first published on September 4, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82911 actively exploited?
CVE-2026-82911 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (12th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-82911?
CVE-2026-82911 has a CVSS base score of 5.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-82911?
An upstream fix for CVE-2026-82911 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-82911 are linked in the Vendor Advisories panel on this page.

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