CVE-2026-35095

MEDIUMPre-NVD 4.84.8
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 96% 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
Trending — 4 sources updated this week
4.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.8Exploit: NoneExposed: 0

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

KTM System e-BOK allows the session identifier to be set by the client prior to authentication. If a cookie with a valid name is set, its value remains unchanged after successful login. This behaviour enables an attacker to fix a session ID for a victim and later hijack the authenticated session.

This issue was fixed in the patch published in June 2026.

CVSS v3
4.8
EG Score
4.8(medium)
EPSS
4.2%
KEV
Not listed

Published

June 30, 2026

Last Modified

June 30, 2026

Advisory Details (2)

Auto-updated Jun 30, 2026
No patch confirmed yet.
generic

Internetowe Biuro Obsługi Klienta | KTM System

https://ktmsystem.pl/internetowe-biuro-obslugi-klienta/
generic

Podatności w oprogramowaniu KTM System e-BOK | CERT Polska

https://cert.pl/posts/2026/06/CVE-2026-35095/

Vendor Advisories for CVE-2026-35095(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 21× in last 7d / 21× 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. 2026-07-06 22:16 UTCEG score recompute
  2. 2026-07-06 22:15 UTCGHSA enrichment
  3. 2026-07-06 02:23 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-06 00:34 UTCEG score recompute
  6. 2026-07-06 00:34 UTCGHSA enrichment
  7. 2026-07-05 02:55 UTCEG score recompute
  8. 2026-07-05 02:55 UTCGHSA enrichment
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-04 05:16 UTCEG score recompute
  12. 2026-07-04 05:15 UTCGHSA enrichment
  13. 2026-07-03 07:34 UTCEG score recompute
  14. 2026-07-03 07:34 UTCGHSA enrichment
  15. 2026-07-02 09:54 UTCEG score recompute
  16. 2026-07-02 09:54 UTCGHSA enrichment
  17. 2026-07-01 15:06 UTCEPSS rescore
  18. 2026-07-01 12:15 UTCEG score recompute
  19. 2026-07-01 12:14 UTCGHSA enrichment
  20. 2026-06-30 14:33 UTCEG score recompute
  21. 2026-06-30 14:32 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-35095?
CVE-2026-35095 is a medium vulnerability published on June 30, 2026. KTM System e-BOK allows the session identifier to be set by the client prior to authentication. If a cookie with a valid name is set, its value remains unchanged after successful login. This behaviour enables an attacker to fix a session ID for a victim and later hijack the authenticated session.…
When was CVE-2026-35095 disclosed?
CVE-2026-35095 was first published in the National Vulnerability Database on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-35095 actively exploited?
CVE-2026-35095 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-35095?
CVE-2026-35095 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-35095?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-35095, 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

Explore the affected products and dependency analysis for CVE-2026-35095

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