CVE-2026-55629

HIGHPre-NVD 8.78.7
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7% (51st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated
8.7EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 8.7Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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
8.7HIGHmedium confidence
EG Risk
70
EG Risk 70/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity87% × 45%
Impact severity (EG Severity): CVSS 8.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
51st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.7): severity, escalated by confirmed exploitation. This CVE's 8.7 is its impact severity (EG Severity), not escalated.

EG Severity
8.7 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.7% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 16, 2026

Last Modified

July 17, 2026

Advisory Details (2)

Auto-updated Jul 16, 2026
Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

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.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
whistle—
  • every version up to 2.10.3: fixed in 2.10.3
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 37× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 139 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 39 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  2. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  3. 2026-10-18 03:30 UTCEG score recompute
  4. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  5. 2026-10-17 03:16 UTCEG score recompute
  6. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  7. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  8. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  9. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  10. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  11. 2026-10-12 15:55 UTCEG score recompute
  12. 2026-10-11 19:38 UTCEG score recompute
  13. 2026-10-11 16:54 UTCEG score recompute
  14. 2026-10-11 14:16 UTCEG score recompute
  15. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  16. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  17. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  18. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  19. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  21. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  22. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  23. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  24. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  25. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 50th percentile
Show 75 more
  1. 2026-10-01 11:22 UTCEG score recompute
  2. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  3. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  4. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  5. 2026-09-28 08:16 UTCEG score recompute
  6. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  7. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  8. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  9. 2026-09-24 07:01 UTCEG score recompute
  10. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  11. 2026-09-23 03:01 UTCEG score recompute
  12. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  13. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  14. 2026-09-18 04:38 UTCEG score recompute
  15. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  16. 2026-09-17 10:29 UTCEG score recompute
  17. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  18. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  19. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  20. 2026-09-13 23:05 UTCEG score recompute
  21. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  22. 2026-09-13 07:07 UTCEG score recompute
  23. 2026-09-11 21:39 UTCEG score recompute
  24. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  25. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  26. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  27. 2026-09-08 00:27 UTCEG score recompute
  28. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  29. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  30. 2026-09-05 20:37 UTCEG score recompute
  31. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  32. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  33. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  34. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  35. 2026-08-31 04:43 UTCEG score recompute
  36. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  37. 2026-08-30 03:31 UTCEG score recompute
  38. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  39. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  40. 2026-08-28 01:52 UTCEG score recompute
  41. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  42. 2026-08-27 00:41 UTCEG score recompute
  43. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  44. 2026-08-25 20:58 UTCEG score recompute
  45. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  46. 2026-08-24 19:20 UTCEG score recompute
  47. 2026-08-23 03:51 UTCEG score recompute
  48. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  49. 2026-08-22 02:39 UTCEG score recompute
  50. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  51. 2026-08-21 01:04 UTCEG score recompute
  52. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  53. 2026-08-19 23:53 UTCEG score recompute
  54. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  55. 2026-08-18 19:55 UTCEG score recompute
  56. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  57. 2026-08-18 02:28 UTCEG score recompute
  58. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  59. 2026-08-17 00:47 UTCEG score recompute
  60. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  61. 2026-08-16 12:10 UTCEG score recompute
  62. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  63. 2026-08-15 10:59 UTCEG score recompute
  64. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  65. 2026-08-14 09:46 UTCEG score recompute
  66. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  67. 2026-08-12 19:47 UTCEG score recompute
  68. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  69. 2026-08-11 18:34 UTCEG score recompute
  70. 2026-08-11 05:59 UTCEG score recompute
  71. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  72. 2026-08-09 16:10 UTCEG score recompute
  73. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  74. 2026-08-09 03:35 UTCEG score recompute
  75. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.5% · 37th percentile

Related CVEs(same product + same CWE)

Same product

1 shown

npm:whistle

Frequently asked(5)

What is CVE-2026-55629?
CVE-2026-55629 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-55629 published?
The CVE record for CVE-2026-55629 was published on July 16, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 17, 2026; the record at its source may have been updated since.
Is CVE-2026-55629 actively exploited?
CVE-2026-55629 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (51st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55629?
CVE-2026-55629 has a CVSS base score of 8.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55629?
A fix for CVE-2026-55629 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-55629 are linked in the Vendor Advisories panel on this page.

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