CVE-2026-53779

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-22. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

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

WebP Server Go through 0.14.4 contains a path traversal vulnerability on Windows that allows unauthenticated attackers to read files outside the configured IMG_PATH directory by sending requests with percent-encoded backslashes (%5C) that bypass the path.Clean() sanitization in handler/router.go. Attackers can exploit the discrepancy between Go's forward-slash-only path normalization and Windows file system APIs that treat backslashes and forward slashes as equivalent to access arbitrary files on the host filesystem accessible to the server process.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

June 22, 2026

Last Modified

July 14, 2026

Advisory Details (3)

Auto-updated Jun 22, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
generic

WebP Server Go < 0.15.0 Path Traversal via Backslash Encoding on Windows | Advisories | VulnCheck

https://www.vulncheck.com/advisories/webp-server-go-path-traversal-via-backslash-encoding-on-windows
github_pr

Harden path handling, enforce strict `meta` checks, and remove `ProxyMode`

Fix merged in webp-sh/webp_server_go PR #451 on 2026-06-03 — awaiting tagged release

https://github.com/webp-sh/webp_server_go/pull/451
github_commit

commit eb3b5f9289b3 (webp-sh/webp_server_go)

Fix landed in webp-sh/webp_server_go commit eb3b5f9289b3 — awaiting tagged release

https://github.com/webp-sh/webp_server_go/commit/eb3b5f9289b331cb639cd610b0d1c532d2cc24e0

Vendor Advisories for CVE-2026-53779(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 5× in last 7d / 58× 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 218 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-53779?
CVE-2026-53779 is a high vulnerability published on June 22, 2026. WebP Server Go through 0.14.4 contains a path traversal vulnerability on Windows that allows unauthenticated attackers to read files outside the configured IMG_PATH directory by sending requests with percent-encoded backslashes (%5C) that bypass the path.Clean() sanitization in handler/router.go.…
When was CVE-2026-53779 disclosed?
CVE-2026-53779 was first published in the National Vulnerability Database on June 22, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53779 actively exploited?
CVE-2026-53779 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 53.8% of all scored CVEs.
What is the CVSS score of CVE-2026-53779?
CVE-2026-53779 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-53779?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53779, 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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