Denial of service via nonterminating Boolean selection
Published Mar 26, 2026 · Updated Mar 26, 2026
Denial of service in antchfx XPath before 1.3.6 allows remote attackers to exhaust a CPU core via a true top-level XPath expression. logicalQuery.Select returns the iterator's current node on every call when a Boolean expression is true, so NodeIterator.MoveNext never receives nil and its caller loops indefinitely. An application must accept attacker-controlled XPath and pass it to an affected query API; one request can pin a goroutine and CPU core until the process restarts.
Summary
What happened
Denial of service in antchfx XPath before 1.3.6 allows remote attackers to exhaust a CPU core via a true top-level XPath expression. logicalQuery.Select returns the iterator's current node on every call when a Boolean expression is true, so NodeIterator.MoveNext never receives nil and its caller loops indefinitely. An application must accept attacker-controlled XPath and pass it to an affected query API; one request can pin a goroutine and CPU core until the process restarts.
The record
- CVE
- CVE-2026-32287
- Published
- Mar 26, 2026
- Updated
- Mar 26, 2026
- Vendor
- antchfx
- Product
- XPath
- Classifications
- CWE-400, CWE-835, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 26, 2026CVE publishedPublication date reported by the CVE source.
- Mar 26, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <1.3.6
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- True top-level XPath expression proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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