CVE-2026-6601 | Lagom WHMCS Template up to 2.4.2 Datatables resource consumption

VDB-358236 · SUBMIT #791943 · CVE-2026-6601 LAGOM WHMCS TEMPLATE UP TO 2.4.2 DATATABLES RESOURCE CONSUMPTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 3.9 $0-$5k 1.44+ Summaryinfo A vulnerability was found in Lagom WHMCS Template up to 2.4.2 and classified as problematic. Affected is an unknown function of the component Datatables. The manipulation results in resource consumption. This vulnerability is identified as CVE-2026-6601. The attack can be executed remotely. Additionally, an exploit exists. The vendor was contacted early about this disclosure but did not respond in any way. Detailsinfo A vulnerability classified as problematic has been found in Lagom WHMCS Template up to 2.4.2. Affected is an unknown code of the component Datatables. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-6601. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1499. The exploit is shared for download at github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Vendor Lagom Name WHMCS Template Version 2.4.0 2.4.1 2.4.2 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 4.3 VulDB Meta Temp Score: 3.9 VulDB Base Score: 4.3 VulDB Temp Score: 3.9 VulDB Vector: 🔒 VulDB Reliability: 🔍 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: Resource consumption CWE: CWE-400 / CWE-404 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Access: Public Status: Proof-of-Concept Download: 🔒 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 04/19/2026 Advisory disclosed 04/19/2026 +0 days VulDB entry created 04/19/2026 +0 days VulDB entry last update Sourcesinfo Advisory: github.com Status: Not defined CVE: CVE-2026-6601 (🔒) GCVE (CVE): GCVE-0-2026-6601 GCVE (VulDB): GCVE-100-358236 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 04/19/2026 16:02 Changes: 04/19/2026 16:02 (55) Complete: 🔍 Submitter: s4nnty Cache ID: 99:76A:101 Submitinfo Accepted Submit #791943: Lagom WHMCS Template ≤ 2.4.2 Denial of Service (by s4nnty) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸