CVE-2026-34906

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6%, top 57% of all CVEs by exploit prediction. 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
9.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.3Exploit: NoneExposed: 0

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

Server-Side Template Injection (SSTI) in Wirtualna Uczelnia allows an unauthenticated attacker to perform Remote Code Execution (RCE). In the endpoint redirectToUrl and parameter redirectUrlParameter, insufficient input validation permits injection of arbitrary template expressions that are executed on the server. Successful exploitation can allow an attacker to run remote commands, including establishing a reverse shell.

This issue affects Wirtualna Uczelnia versions up to wu#2016.437.295#0#20260327_105545

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
—
EPSS
43.0%
KEV
Not listed

Published

June 2, 2026

Last Modified

July 22, 2026

Advisory Details (2)

Auto-updated Jun 2, 2026
No patch confirmed yet.
generic

Oprogramowanie dla uczelni wyższych – system ERP - Simple

https://simple.com.pl/branze/edukacyjna/
generic

Podatności w oprogramowaniu Wirtualna Uczelnia | CERT Polska

https://cert.pl/posts/2026/06/CVE-2026-34906

Vendor Advisories for CVE-2026-34906(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 8× in last 7d / 97× 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 234 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-34906?
CVE-2026-34906 is a critical vulnerability published on June 2, 2026. Server-Side Template Injection (SSTI) in Wirtualna Uczelnia allows an unauthenticated attacker to perform Remote Code Execution (RCE). In the endpoint redirectToUrl and parameter redirectUrlParameter, insufficient input validation permits injection of arbitrary template expressions that are…
When was CVE-2026-34906 disclosed?
CVE-2026-34906 was first published in the National Vulnerability Database on June 2, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34906 actively exploited?
CVE-2026-34906 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 43.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-34906?
CVE-2026-34906 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-34906?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34906, 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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