CVE-2026-55629

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7%, top 51% 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
Elevated
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.7Exploit: Elevated riskExposed: 0

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

Whistle is an HTTP, HTTP2, HTTPS, and WebSocket debugging proxy. Prior to 2.10.3, lib/service/service.js handles GET /cgi-bin/temp/get by reading req.query.filename, joining it to TEMP_FILES_PATH only when it matches the temporary file pattern, and otherwise passing the user-supplied filename directly to getFile, allowing a remote attacker to read arbitrary files such as /etc/passwd. This issue is reported as fixed in version 2.10.3.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
70(Attend)
EG Risk 70/100SSVC: Attend

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
Severity87% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
49%
KEV
Not listed

Published

July 16, 2026

Last Modified

July 17, 2026

Advisory Details (2)

Auto-updated Jul 16, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

Security Vulnerability:Path traversal · Advisory · avwo/whistle · GitHub

https://github.com/avwo/whistle/security/advisories/GHSA-3vfr-4gwf-qxfp
github_commit

commit 777bcf69bae2 (avwo/whistle)

Fix landed in avwo/whistle commit 777bcf69bae2 — awaiting tagged release

https://github.com/avwo/whistle/commit/777bcf69bae2972aa7138a158c91619185653cf5

Vendor Advisories for CVE-2026-55629(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 10× in last 7d / 53× 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. 2026-08-30 03:31 UTCEG score recompute
  2. 2026-08-30 01:22 UTCEPSS rescore
  3. 2026-08-28 21:41 UTCEPSS rescore
  4. 2026-08-28 01:52 UTCEG score recompute
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-27 00:41 UTCEG score recompute
  7. 2026-08-26 14:46 UTCEPSS rescore
  8. 2026-08-25 20:58 UTCEG score recompute
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-24 19:20 UTCEG score recompute
  11. 2026-08-23 03:51 UTCEG score recompute
  12. 2026-08-23 00:19 UTCEPSS rescore
  13. 2026-08-22 02:39 UTCEG score recompute
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 01:04 UTCEG score recompute
  16. 2026-08-20 22:55 UTCEPSS rescore
  17. 2026-08-19 23:53 UTCEG score recompute
  18. 2026-08-19 17:04 UTCEPSS rescore
  19. 2026-08-18 19:55 UTCEG score recompute
  20. 2026-08-18 13:48 UTCEPSS rescore
  21. 2026-08-18 02:28 UTCEG score recompute
  22. 2026-08-17 13:47 UTCEPSS rescore
  23. 2026-08-17 00:47 UTCEG score recompute
  24. 2026-08-16 14:56 UTCEPSS rescore
  25. 2026-08-16 12:10 UTCEG score recompute
Show 53 more
  1. 2026-08-16 02:14 UTCEPSS rescore
  2. 2026-08-15 10:59 UTCEG score recompute
  3. 2026-08-15 01:30 UTCEPSS rescore
  4. 2026-08-14 09:46 UTCEG score recompute
  5. 2026-08-13 22:00 UTCEPSS rescore
  6. 2026-08-12 19:47 UTCEG score recompute
  7. 2026-08-12 13:51 UTCEPSS rescore
  8. 2026-08-11 18:34 UTCEG score recompute
  9. 2026-08-11 05:59 UTCEG score recompute
  10. 2026-08-11 00:00 UTCEPSS rescore
  11. 2026-08-09 16:10 UTCEG score recompute
  12. 2026-08-09 13:46 UTCEPSS rescore
  13. 2026-08-09 03:35 UTCEG score recompute
  14. 2026-08-08 16:37 UTCEPSS rescore
  15. 2026-08-08 02:23 UTCEG score recompute
  16. 2026-08-07 01:11 UTCEG score recompute
  17. 2026-08-06 13:47 UTCEPSS rescore
  18. 2026-08-05 23:58 UTCEG score recompute
  19. 2026-08-05 19:17 UTCEPSS rescore
  20. 2026-08-04 22:47 UTCEG score recompute
  21. 2026-08-04 15:10 UTCEPSS rescore
  22. 2026-08-04 10:39 UTCEPSS rescore
  23. 2026-08-03 21:31 UTCEG score recompute
  24. 2026-08-03 10:36 UTCEPSS rescore
  25. 2026-08-02 07:44 UTCEG score recompute
  26. 2026-08-02 02:27 UTCEPSS rescore
  27. 2026-08-01 06:32 UTCEG score recompute
  28. 2026-08-01 04:16 UTCEPSS rescore
  29. 2026-07-31 05:00 UTCEG score recompute
  30. 2026-07-30 16:28 UTCEPSS rescore
  31. 2026-07-30 16:24 UTCEG score recompute
  32. 2026-07-30 03:47 UTCEG score recompute
  33. 2026-07-30 01:30 UTCEPSS rescore
  34. 2026-07-29 02:34 UTCEG score recompute
  35. 2026-07-28 15:37 UTCEPSS rescore
  36. 2026-07-28 01:19 UTCEG score recompute
  37. 2026-07-27 00:04 UTCEG score recompute
  38. 2026-07-26 14:54 UTCEPSS rescore
  39. 2026-07-26 11:25 UTCEG score recompute
  40. 2026-07-25 14:18 UTCEPSS rescore
  41. 2026-07-24 14:18 UTCEPSS rescore
  42. 2026-07-23 14:18 UTCEPSS rescore
  43. 2026-07-23 03:20 UTCEG score recompute
  44. 2026-07-22 14:08 UTCEPSS rescore
  45. 2026-07-21 15:25 UTCEPSS rescore
  46. 2026-07-20 17:08 UTCEPSS rescore
  47. 2026-07-19 14:31 UTCEPSS rescore
  48. 2026-07-19 14:31 UTCEPSS rescore
  49. 2026-07-19 02:34 UTCEG score recompute
  50. 2026-07-19 02:29 UTCEPSS rescore
  51. 2026-07-18 10:04 UTCEPSS rescore
  52. 2026-07-16 19:45 UTCEG score recompute
  53. 2026-07-16 19:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-55629?
CVE-2026-55629 is a high vulnerability published on July 16, 2026. Whistle is an HTTP, HTTP2, HTTPS, and WebSocket debugging proxy. Prior to 2.10.3, lib/service/service.js handles GET /cgi-bin/temp/get by reading req.query.filename, joining it to TEMPFILESPATH only when it matches the temporary file pattern, and otherwise passing the user-supplied filename…
When was CVE-2026-55629 disclosed?
CVE-2026-55629 was first published in the National Vulnerability Database on July 16, 2026, with the most recent update on July 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55629 actively exploited?
CVE-2026-55629 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 50.9% of all scored CVEs.
What is the CVSS score of CVE-2026-55629?
CVE-2026-55629 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-55629?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55629, 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-2026-55629

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