Infinite loop in github.com/antchfx/xpath

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Summary

CVECVE-2026-32287
StatePUBLISHED
AssignerGo
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-26 20:16:12 UTC
Updated2026-04-21 15:33:09 UTC
DescriptionBoolean XPath expressions that evaluate to true can cause an infinite loop in logicalQuery.Select, leading to 100% CPU usage. This can be triggered by top-level selectors such as "1=1" or "true()".

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000560000 probability, percentile 0.176940000 (date 2026-04-22)

Problem Types: CWE-835 | CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Antchfx Xpath All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Github.comantchfxxpath Github.com/antchfx/xpath affected 1.3.6 semver Not specified

References

ReferenceSourceLinkTags
securityinfinity.com/research/infinite-loop-dos-in-antchfx-xpath-logicalquery-select 134c704f-9b21-4f2e-91b3-4a467353bcc0 securityinfinity.com Exploit, Third Party Advisory
pkg.go.dev/vuln/GO-2026-4526 [email protected] pkg.go.dev Third Party Advisory
github.com/antchfx/xpath/issues/121 [email protected] github.com Issue Tracking, Third Party Advisory
github.com/golang/vulndb/issues/4526 [email protected] github.com Issue Tracking, Third Party Advisory
github.com/antchfx/xpath/commit/afd4762cc342af56345a3fb4002a59281fcab494 [email protected] github.com Patch
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