CVE-2026-31381 | Gainsight Assist OAuth Call state get request method with sensitive query strings

VDB-352067 · CVE-2026-31381 · GCVE-0-2026-31381 GAINSIGHT ASSIST OAUTH CALL STATE GET REQUEST METHOD WITH SENSITIVE QUERY STRINGS HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.3 $0-$5k 1.66+ Summaryinfo A vulnerability identified as problematic has been detected in Gainsight Assist. Affected by this issue is some unknown functionality of the component OAuth Call Handler. The manipulation of the argument state leads to use of get request method with sensitive query strings. This vulnerability is uniquely identified as CVE-2026-31381. The attack is possible to be carried out remotely. No exploit exists. Detailsinfo A vulnerability was found in Gainsight Assist (affected version not known) and classified as problematic. This issue affects some unknown functionality of the component OAuth Call Handler. The manipulation of the argument state with an unknown input leads to a use of get request method with sensitive query strings vulnerability. Using CWE to declare the problem leads to CWE-598. The web application uses the HTTP GET method to process a request and includes sensitive information in the query string of that request. Impacted is confidentiality. The summary by CVE is: An attacker can extract user email addresses (PII) exposed in base64 encoding via the state parameter in the OAuth callback URL. The weakness was disclosed by Christopher O'Boyle. It is possible to read the advisory at rapid7.com. The identification of this vulnerability is CVE-2026-31381 since 03/09/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/20/2026). There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Vendor Gainsight Name Assist CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.3 VulDB Meta Temp Score: 5.3 VulDB Base Score: 5.3 VulDB Temp Score: 5.3 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 5.3 CNA Vector (rapid7): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Use of get request method with sensitive query strings CWE: CWE-598 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/09/2026 CVE reserved 03/20/2026 +11 days Advisory disclosed 03/20/2026 +0 days VulDB entry created 03/20/2026 +0 days VulDB entry last update Sourcesinfo Advisory: rapid7.com Researcher: Christopher O'Boyle Status: Not defined CVE: CVE-2026-31381 (🔒) GCVE (CVE): GCVE-0-2026-31381 GCVE (VulDB): GCVE-100-352067 Entryinfo Created: 03/20/2026 14:59 Changes: 03/20/2026 14:59 (62) Complete: 🔍 Cache ID: 99:5CE:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸