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CVE-2026-101296

CVE-2026-101296

validatedZero produced an exploit or a check.

GHSA-5q2g-877c-9cwh ↗EUVD-2026-105010 ↗

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.
Apache Software Foundation Apache Tomcat >= 11.0.0-M1, <= 11.0.26; >= 10.1.0-M1, <= 10.1.60; >= 9.0.0.M1, <= 9.0.122; >= 8.5.0, <= 8.5.100; >= 7.0.0, <= 7.0.109
CWE-304 Missing Critical Step in Authentication
ETK-2026-2186Zero's internal tracking ID, independent of the CVE number., permanent identifier
cvss9.1nvdCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
+1h40mTTV
17mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = cve.org publication
trigger signal (cve.org) +0mcheck available+100magent stopped
0
+30min
+60min
+90min

description

Apache Tomcat is affected by an authentication validation flaw in JNDIRealm. An attacker may be accepted without a valid password when JNDIRealm uses a non-GSSAPI SASL authentication mechanism.

mitigation

Upgrade Tomcat to 11.0.27, 10.1.61, or 9.0.123, as appropriate for the deployed release line. Until upgraded, avoid using JNDIRealm with non-GSSAPI SASL authentication mechanisms.

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.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
17m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-20 13:45Z
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. 2026-10-20 13:45Z
    cve_org: trigger signal, started the run
    https://www.cve.org/CVERecord?id=CVE-2026-101296

this entry in the feed

GET /api/v1/feed/CVE-2026-101296

{
  "etk_id": "ETK-2026-2186",
  "cve_id": "CVE-2026-101296",
  "display_id": "CVE-2026-101296",
  "ghsa_id": "GHSA-5q2g-877c-9cwh",
  "euvd_id": "EUVD-2026-105010",
  "status": "published",
  "anchor_state": "anchored",
  "title": "JNDIRealm authentication bypass in Apache Tomcat",
  "summary": "Apache Tomcat is affected by an authentication validation flaw in JNDIRealm. An attacker may be accepted without a valid password when JNDIRealm uses a non-GSSAPI SASL authentication mechanism.",
  "mitigation": "Upgrade Tomcat to 11.0.27, 10.1.61, or 9.0.123, as appropriate for the deployed release line. Until upgraded, avoid using JNDIRealm with non-GSSAPI SASL authentication mechanisms.",
  "vendor": "Apache Software Foundation",
  "product": "Apache Tomcat",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 11.0.0-M1, <= 11.0.26",
        ">= 10.1.0-M1, <= 10.1.60",
        ">= 9.0.0.M1, <= 9.0.122",
        ">= 8.5.0, <= 8.5.100",
        ">= 7.0.0, <= 7.0.109"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "Apache Tomcat",
      "purl": null
    }
  ],
  "cwes": [
    304
  ],
  "cvss_score": 9.1,
  "cvss_src": "nvd",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 17.10091015,
  "t0_at": "2026-10-20T13:45:39.959000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-20T15:25:39.911876+00:00",
      "days": 0.06944389902777778,
      "is_lower_bound": false,
      "measured_at": "2026-10-20T13:45:39.959000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-20T13:45:39.959000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-20T13:45:39.959000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-101296"
    }
  }
}

published 2026-10-20 15:08Z
last change 2026-10-21 10:15Z

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