Process crash via truncated UTF-8 node names
Published May 10, 2026 · Updated May 10, 2026
Out-of-bounds read in XML::LibXML 2.0210 and earlier allows remote attackers to crash Perl processes via truncated UTF-8 node names. The domParseChar function reads expected continuation bytes beyond a string's NUL terminator, and LibXML_test_node_name advances by the invalid reported length. Reachability requires an application to pass attacker-controlled element or attribute names into a DOM node-name method; returned data does not expose adjacent memory, so the grounded consequence is a process crash.
Summary
What happened
Out-of-bounds read in XML::LibXML 2.0210 and earlier allows remote attackers to crash Perl processes via truncated UTF-8 node names. The domParseChar function reads expected continuation bytes beyond a string's NUL terminator, and LibXML_test_node_name advances by the invalid reported length. Reachability requires an application to pass attacker-controlled element or attribute names into a DOM node-name method; returned data does not expose adjacent memory, so the grounded consequence is a process crash.
The record
- CVE
- CVE-2026-8177
- Published
- May 10, 2026
- Updated
- May 10, 2026
- Vendor
- Shlomi Fish
- Product
- XML::LibXML
- Classifications
- CWE-125, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 10, 2026CVE publishedPublication date reported by the CVE source.
- May 10, 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?
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- Affected versionversion=0 <=2.0210
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
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Your stack
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