CVE-2026-49294

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 95% 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
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.1Exploit: NoneExposed: 0

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

Valhalla is an open source routing engine and accompanying libraries for use with OpenStreetMap data. Versions 3.6.3 and prior are vulnerable to reflected cross-site scripting (XSS) due to improper neutralization of input in the JSONP callback parameter. When a request specifies a JSONP callback, the value is reflected directly into the HTTP response body with Content-Type: application/javascript, without any validation, output encoding, or allowlist filtering. An attacker can craft a URL containing arbitrary JavaScript in the callback parameter; if a victim is induced to load that URL via a tag, the injected script executes in the context of the serving origin, potentially leading to session token theft, credential disclosure, or actions performed on behalf of the victim. This issue was not fixed at time of publication.

CVSS v3
6.1
EG Score
6.1(medium)
EPSS
4.5%
KEV
Not listed

Published

June 15, 2026

Last Modified

June 16, 2026

Advisory Details (1)

Auto-updated Jun 15, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Reflected XSS via unsanitized JSONP callback parameter · Advisory · valhalla/valhalla · GitHub

https://github.com/valhalla/valhalla/security/advisories/GHSA-85xx-39j8-r56x

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 64× 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. 2026-07-15 22:55 UTCEG score recompute
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:00 UTCEPSS rescore
  4. 2026-07-14 20:49 UTCEG score recompute
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  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-12 15:49 UTCEG score recompute
  9. 2026-07-12 05:46 UTCEPSS rescore
  10. 2026-07-11 12:32 UTCEG score recompute
  11. 2026-07-11 08:27 UTCEPSS rescore
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  13. 2026-07-09 19:10 UTCEPSS rescore
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  15. 2026-07-08 15:16 UTCEPSS rescore
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  17. 2026-07-07 13:46 UTCEPSS rescore
  18. 2026-07-07 00:23 UTCEG score recompute
  19. 2026-07-06 16:27 UTCEPSS rescore
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  21. 2026-07-05 12:10 UTCEG score recompute
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  24. 2026-07-04 06:31 UTCEPSS rescore
  25. 2026-07-03 05:00 UTCEG score recompute
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  1. 2026-07-02 02:20 UTCEG score recompute
  2. 2026-07-01 15:07 UTCEPSS rescore
  3. 2026-07-01 00:14 UTCEG score recompute
  4. 2026-06-30 23:22 UTCEPSS rescore
  5. 2026-06-29 22:09 UTCEG score recompute
  6. 2026-06-29 14:06 UTCEPSS rescore
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  8. 2026-06-28 20:03 UTCEG score recompute
  9. 2026-06-28 14:07 UTCEPSS rescore
  10. 2026-06-28 04:56 UTCEPSS rescore
  11. 2026-06-28 04:56 UTCEPSS rescore
  12. 2026-06-27 17:57 UTCEG score recompute
  13. 2026-06-27 03:08 UTCEPSS rescore
  14. 2026-06-26 15:49 UTCEG score recompute
  15. 2026-06-25 13:49 UTCEPSS rescore
  16. 2026-06-25 13:39 UTCEG score recompute
  17. 2026-06-24 14:05 UTCEPSS rescore
  18. 2026-06-24 11:33 UTCEG score recompute
  19. 2026-06-23 21:33 UTCEPSS rescore
  20. 2026-06-23 21:33 UTCEPSS rescore
  21. 2026-06-23 09:28 UTCEG score recompute
  22. 2026-06-22 14:25 UTCEPSS rescore
  23. 2026-06-22 14:25 UTCEPSS rescore
  24. 2026-06-22 07:11 UTCEG score recompute
  25. 2026-06-21 14:56 UTCEPSS rescore
  26. 2026-06-21 14:56 UTCEPSS rescore
  27. 2026-06-21 04:42 UTCEG score recompute
  28. 2026-06-21 01:59 UTCEPSS rescore
  29. 2026-06-21 01:59 UTCEPSS rescore
  30. 2026-06-20 02:31 UTCEG score recompute
  31. 2026-06-19 19:26 UTCEPSS rescore
  32. 2026-06-19 19:26 UTCEPSS rescore
  33. 2026-06-19 00:24 UTCEG score recompute
  34. 2026-06-18 17:52 UTCEPSS rescore
  35. 2026-06-18 17:52 UTCEPSS rescore
  36. 2026-06-17 22:17 UTCEG score recompute
  37. 2026-06-17 17:53 UTCEPSS rescore
  38. 2026-06-16 20:00 UTCEG score recompute
  39. 2026-06-16 17:53 UTCEPSS rescore
  40. 2026-06-15 17:54 UTCEG score recompute
  41. 2026-06-15 17:53 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-49294?
CVE-2026-49294 is a medium vulnerability published on June 15, 2026. Valhalla is an open source routing engine and accompanying libraries for use with OpenStreetMap data. Versions 3.6.3 and prior are vulnerable to reflected cross-site scripting (XSS) due to improper neutralization of input in the JSONP callback parameter. When a request specifies a JSONP callback,…
When was CVE-2026-49294 disclosed?
CVE-2026-49294 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49294 actively exploited?
CVE-2026-49294 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-49294?
CVE-2026-49294 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-49294?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49294, 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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