CVE-2026-55496

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 81% 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
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: Elevated riskExposed: 0

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

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, GET /api/v4/user/search calls SearchActive without adding a StatusActive predicate and serializes matches at RedactLevelUser, allowing any logged-in user to enumerate email addresses and profile metadata for inactive or banned accounts. The service calls userClient.SearchActive, but despite its name that method filters only by email/nickname keyword and never adds a StatusActive predicate — while the sibling lookups GetActiveByID and GetActiveByDavAccount, defined a few lines above it, do. Search hits are serialized at RedactLevelUser, which includes the email address. This issue is fixed in version 4.17.0.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

July 24, 2026

Last Modified

September 8, 2026

Advisory Details (3)

Auto-updated Jul 31, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

Information Exposure in `GET /api/v4/user/search`: `SearchActive` omits the active-status predicate, leaking inactive/banned account emails · Advisory · cloudreve/cloudreve · GitHub

https://github.com/cloudreve/cloudreve/security/advisories/GHSA-8r7f-r8hj-r3rv
github_release Patch Available

4.17.0

Patch available: cloudreve/cloudreve 4.17.0

https://github.com/cloudreve/cloudreve/releases/tag/4.17.0
github_commit

commit 7e1289d55279 (cloudreve/cloudreve)

Fix landed in cloudreve/cloudreve commit 7e1289d55279 — awaiting tagged release

https://github.com/cloudreve/cloudreve/commit/7e1289d552794bdbeb551be78456115c87dcb3da

Vendor Advisories for CVE-2026-55496(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 1 ecosystem)
Go(3)
PackageVulnerable rangeFixed inDependents
github.com/cloudreve/Cloudreve———
github.com/cloudreve/Cloudreve/v3———
github.com/cloudreve/Cloudreve/v4—4.0.0-20260613023921-7e1289d55279—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 43× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 03:43 UTCEG score recompute
  3. 2026-09-17 19:31 UTCEPSS rescore
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  1. 2026-09-01 13:54 UTCEPSS rescore
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  3. 2026-08-30 22:47 UTCEG score recompute
  4. 2026-08-30 19:17 UTCEPSS rescore
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  7. 2026-08-28 21:41 UTCEPSS rescore
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  17. 2026-08-21 06:23 UTCEG score recompute
  18. 2026-08-20 22:55 UTCEPSS rescore
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  20. 2026-08-19 17:04 UTCEPSS rescore
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  22. 2026-08-18 13:48 UTCEPSS rescore
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  24. 2026-08-17 13:47 UTCEPSS rescore
  25. 2026-08-17 12:14 UTCEG score recompute
  26. 2026-08-16 14:56 UTCEPSS rescore
  27. 2026-08-16 13:41 UTCEG score recompute
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  34. 2026-08-12 13:51 UTCEPSS rescore
  35. 2026-08-11 20:54 UTCEG score recompute
  36. 2026-08-11 00:00 UTCEPSS rescore
  37. 2026-08-09 23:50 UTCEG score recompute
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  40. 2026-08-08 16:37 UTCEPSS rescore
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  43. 2026-08-06 13:47 UTCEPSS rescore
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  45. 2026-08-05 19:17 UTCEPSS rescore
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  47. 2026-08-04 15:10 UTCEPSS rescore
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  55. 2026-07-31 14:25 UTCEG score recompute
  56. 2026-07-31 14:09 UTCEG score recompute
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  58. 2026-07-31 02:30 UTCEG score recompute
  59. 2026-07-27 08:15 UTCEG score recompute
  60. 2026-07-24 21:13 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-55496?
CVE-2026-55496 is a medium vulnerability published on July 24, 2026. Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, GET /api/v4/user/search calls SearchActive without adding a StatusActive predicate and serializes matches at RedactLevelUser, allowing any logged-in user to enumerate email addresses and profile metadata for inactive or…
When was CVE-2026-55496 disclosed?
CVE-2026-55496 was first published in the National Vulnerability Database on July 24, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55496 actively exploited?
CVE-2026-55496 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 81.3% of all scored CVEs.
What is the CVSS score of CVE-2026-55496?
CVE-2026-55496 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-55496?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55496, 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

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