CVE-2026-4645 | antchfx xpath Boolean XPath Expression infinite loop (ID 121)

VDB-352518 · CVE-2026-4645 · ID 121 ANTCHFX XPATH BOOLEAN XPATH EXPRESSION INFINITE LOOP HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.3 $0-$5k 1.92+ Summaryinfo A vulnerability described as problematic has been identified in antchfx xpath. Affected by this issue is some unknown functionality of the component Boolean XPath Expression Handler. The manipulation results in infinite loop. This vulnerability was named CVE-2026-4645. The attack may be performed from remote. There is no available exploit. It is best practice to apply a patch to resolve this issue. Detailsinfo A vulnerability was found in antchfx xpath (unknown version). It has been classified as problematic. Affected is an unknown code block of the component Boolean XPath Expression Handler. The manipulation with an unknown input leads to a infinite loop vulnerability. CWE is classifying the issue as CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. This is going to have an impact on availability. CVE summarizes: A flaw was found in the `github.com/antchfx/xpath` component. A remote attacker could exploit this vulnerability by submitting crafted Boolean XPath expressions that evaluate to true. This can cause an infinite loop in the `logicalQuery.Select` function, leading to 100% CPU utilization and a Denial of Service (DoS) condition for the affected system. The advisory is available at access.redhat.com. This vulnerability is traded as CVE-2026-4645 since 03/23/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project. Applying the patch afd4762cc342af56345a3fb4002a59281fcab494 is able to eliminate this problem. The bugfix is ready for download at github.com. Productinfo Vendor antchfx Name xpath License open-source Website Product: https://github.com/antchfx/xpath/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.4 VulDB Meta Temp Score: 6.3 VulDB Base Score: 5.3 VulDB Temp Score: 5.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.5 CNA Vector (redhat): 🔒 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: Infinite loop CWE: CWE-835 / CWE-404 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: Patch Status: 🔍 0-Day Time: 🔒 Patch: afd4762cc342af56345a3fb4002a59281fcab494 Timelineinfo 03/23/2026 Advisory disclosed 03/23/2026 +0 days CVE reserved 03/23/2026 +0 days VulDB entry created 03/23/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: 121 Status: Confirmed CVE: CVE-2026-4645 (🔒) GCVE (CVE): GCVE-0-2026-4645 GCVE (VulDB): GCVE-100-352518 Entryinfo Created: 03/23/2026 15:34 Changes: 03/23/2026 15:34 (65) Complete: 🔍 Cache ID: 99:618:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸