CVE-2026-55677

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 65% 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
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

Echo is a Go web framework. Prior to 4.15.3 and 5.2.0, Echo's router and static file handler disagree on URL path decoding. The router matches routes using the raw encoded path (preserving %2F as-is), while StaticDirectoryHandler unescapes %2F to / before resolving filesystem paths. This allows an attacker to bypass route-level access controls and read static files without authorization. This vulnerability is fixed in 4.15.3 and 5.2.0.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
34.8%
KEV
Not listed

Published

June 26, 2026

Last Modified

June 26, 2026

Advisory Details (1)

Auto-updated Jun 26, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Encoded slash (%2F) bypasses route-level protection and exposes static files · Advisory · labstack/echo · GitHub

https://github.com/labstack/echo/security/advisories/GHSA-vfp3-v2gw-7wfq

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 27× in last 7d / 73× 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 21:16 UTCEG score recompute
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 09:47 UTCEG score recompute
  5. 2026-07-15 02:00 UTCEPSS rescore
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  7. 2026-07-14 22:14 UTCEG score recompute
  8. 2026-07-14 10:46 UTCEG score recompute
  9. 2026-07-13 23:15 UTCEG score recompute
  10. 2026-07-13 22:31 UTCEPSS rescore
  11. 2026-07-13 11:48 UTCEG score recompute
  12. 2026-07-13 06:13 UTCEPSS rescore
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  14. 2026-07-13 00:17 UTCEG score recompute
  15. 2026-07-12 12:49 UTCEG score recompute
  16. 2026-07-12 05:46 UTCEPSS rescore
  17. 2026-07-12 01:21 UTCEG score recompute
  18. 2026-07-11 13:53 UTCEG score recompute
  19. 2026-07-11 08:27 UTCEPSS rescore
  20. 2026-07-11 08:27 UTCEPSS rescore
  21. 2026-07-11 02:25 UTCEG score recompute
  22. 2026-07-10 14:57 UTCEG score recompute
  23. 2026-07-10 03:28 UTCEG score recompute
  24. 2026-07-09 19:10 UTCEPSS rescore
  25. 2026-07-09 19:10 UTCEPSS rescore
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  1. 2026-07-09 16:01 UTCEG score recompute
  2. 2026-07-09 04:22 UTCEG score recompute
  3. 2026-07-08 16:53 UTCEG score recompute
  4. 2026-07-08 15:16 UTCEPSS rescore
  5. 2026-07-08 15:16 UTCEPSS rescore
  6. 2026-07-08 05:26 UTCEG score recompute
  7. 2026-07-07 17:49 UTCEG score recompute
  8. 2026-07-07 13:46 UTCEPSS rescore
  9. 2026-07-07 13:46 UTCEPSS rescore
  10. 2026-07-07 06:00 UTCEG score recompute
  11. 2026-07-06 18:31 UTCEG score recompute
  12. 2026-07-06 16:27 UTCEPSS rescore
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  14. 2026-07-06 07:01 UTCEG score recompute
  15. 2026-07-06 02:23 UTCEPSS rescore
  16. 2026-07-06 02:23 UTCEPSS rescore
  17. 2026-07-05 19:32 UTCEG score recompute
  18. 2026-07-05 08:04 UTCEG score recompute
  19. 2026-07-05 02:31 UTCEPSS rescore
  20. 2026-07-05 02:30 UTCEPSS rescore
  21. 2026-07-04 20:35 UTCEG score recompute
  22. 2026-07-04 09:07 UTCEG score recompute
  23. 2026-07-04 06:31 UTCEPSS rescore
  24. 2026-07-04 06:31 UTCEPSS rescore
  25. 2026-07-03 21:39 UTCEG score recompute
  26. 2026-07-03 10:11 UTCEG score recompute
  27. 2026-07-02 22:43 UTCEG score recompute
  28. 2026-07-02 11:16 UTCEG score recompute
  29. 2026-07-01 23:48 UTCEG score recompute
  30. 2026-07-01 15:07 UTCEPSS rescore
  31. 2026-07-01 12:20 UTCEG score recompute
  32. 2026-07-01 00:53 UTCEG score recompute
  33. 2026-06-30 23:22 UTCEPSS rescore
  34. 2026-06-30 13:25 UTCEG score recompute
  35. 2026-06-30 01:56 UTCEG score recompute
  36. 2026-06-29 14:29 UTCEG score recompute
  37. 2026-06-29 14:06 UTCEPSS rescore
  38. 2026-06-29 14:06 UTCEPSS rescore
  39. 2026-06-29 03:01 UTCEG score recompute
  40. 2026-06-28 15:33 UTCEG score recompute
  41. 2026-06-28 14:07 UTCEPSS rescore
  42. 2026-06-28 04:56 UTCEPSS rescore
  43. 2026-06-28 04:56 UTCEPSS rescore
  44. 2026-06-28 04:06 UTCEG score recompute
  45. 2026-06-27 16:38 UTCEG score recompute
  46. 2026-06-27 05:10 UTCEG score recompute
  47. 2026-06-26 17:41 UTCEG score recompute
  48. 2026-06-26 17:41 UTCNVD updatefirst tracked

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Frequently asked(5)

What is CVE-2026-55677?
CVE-2026-55677 is a high vulnerability published on June 26, 2026. Echo is a Go web framework. Prior to 4.15.3 and 5.2.0, Echo's router and static file handler disagree on URL path decoding. The router matches routes using the raw encoded path (preserving %2F as-is), while StaticDirectoryHandler unescapes %2F to / before resolving filesystem paths. This allows an…
When was CVE-2026-55677 disclosed?
CVE-2026-55677 was first published in the National Vulnerability Database on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55677 actively exploited?
CVE-2026-55677 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-55677?
CVE-2026-55677 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-55677?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55677, 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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