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CVE-2026-55387

CVE-2026-55387

validatedZero produced an exploit or a check.

GHSA-wxrv-73x6-8r62 ↗EUVD-2026-101609 ↗

check availableZero validated a working check for it.not proven exploitableZero has a detection check, but hasn't produced a full working exploit yet.
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
InvoiceShelf < 2.4.0
fixed in 2.4.0
CWE-284 Improper Access Control
ETK-2026-1837Zero's internal tracking ID, independent of the CVE number., permanent identifier
pkg:github/InvoiceShelf/InvoiceShelf
cvss7.2cna vendorCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
+2.3dTTV
23mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = cve.org publication
trigger signal (cve.org) +0dcheck available+2.3dagent stopped
0
+1d
+2d

description

InvoiceShelf versions 2.3.3 and earlier do not consistently enforce company ownership when processing bulk-delete requests. An authenticated user may delete records associated with another company if they can provide applicable record identifiers.

mitigation

Upgrade InvoiceShelf to version 2.4.0 or later. Restrict access to affected bulk-delete functions until the upgrade is complete.

fixed in 2.4.0

check
available
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
deterministic
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
yes, low privileges
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
0.34%26th percentile
agent run time
23m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-14 19:21Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
–
Δ to kevAttacks confirmed in the real world.
–

outcome

Check only, differential: the check fires on the vulnerable build and is silent on the patched one.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-10-14 19:21Z
    cve_org: trigger signal, started the run
    https://www.cve.org/CVERecord?id=CVE-2026-55387

this entry in the feed

GET /api/v1/feed/CVE-2026-55387

{
  "etk_id": "ETK-2026-1837",
  "cve_id": "CVE-2026-55387",
  "display_id": "CVE-2026-55387",
  "ghsa_id": "GHSA-wxrv-73x6-8r62",
  "euvd_id": "EUVD-2026-101609",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Cross-tenant bulk-deletion authorization flaw in InvoiceShelf",
  "summary": "InvoiceShelf versions 2.3.3 and earlier do not consistently enforce company ownership when processing bulk-delete requests. An authenticated user may delete records associated with another company if they can provide applicable record identifiers.",
  "mitigation": "Upgrade InvoiceShelf to version 2.4.0 or later. Restrict access to affected bulk-delete functions until the upgrade is complete.",
  "vendor": "InvoiceShelf",
  "product": "InvoiceShelf",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 2.4.0"
      ],
      "ecosystem": "actions",
      "fixed_versions": [
        "2.4.0"
      ],
      "package_name": "InvoiceShelf/InvoiceShelf",
      "purl": "pkg:github/InvoiceShelf/InvoiceShelf"
    }
  ],
  "cwes": [
    284
  ],
  "cvss_score": 7.2,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
  "epss_score": 0.0034,
  "epss_percentile": 0.2611,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 23.192453116666666,
  "t0_at": "2026-10-14T19:21:49.520000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-17T03:29:01.060487+00:00",
      "days": 2.338328014895833,
      "is_lower_bound": false,
      "measured_at": "2026-10-14T19:21:49.520000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-14T19:21:49.520000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-14T19:21:49.520000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-55387"
    }
  }
}

published 2026-10-17 03:05Z
last change 2026-10-21 05:31Z

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