CVE-2026-8177

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-8177
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8177.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-8177
Downstream
Related
Published
2026-05-10T20:48:51Z
Modified
2026-09-20T14:16:33Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences
Details

XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences.

A node name ending in the middle of a multi byte UTF-8 sequence causes the parser to read past the end of the input string into adjacent heap memory.

Any Perl process that passes attacker controlled strings to XML::LibXML's DOM node-name methods can reach this path on the default API. The likely consequence is a crash, causing denial of service.

Database specific 
{
    "cna_assigner": "CPANSec",
    "cwe_ids": [
        "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8177.json"
}
References

Affected packages

Git / github.com/cpan-authors/xml-libxml

Affected ranges

Type
GIT
Repo
https://github.com/cpan-authors/xml-libxml
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
e400c9d2d4a063d1ab827d3b0fe5447cd77b3a2f
Fixed
15652bd905a6c9dda59a81b14d4766adbbae2ea8
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.0210"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

XML-LibXML-2.*
XML-LibXML-2.0117
XML-LibXML-2.0118
XML-LibXML-2.0119
XML-LibXML-2.0120
XML-LibXML-2.0121
XML-LibXML-2.0122
XML-LibXML-2.0123
XML-LibXML-2.0124
XML-LibXML-2.0125
XML-LibXML-2.0126
XML-LibXML-2.0127
XML-LibXML-2.0128
XML-LibXML-2.0129
XML-LibXML-2.0131
XML-LibXML-2.0132
XML-LibXML-2.0133
XML-LibXML-2.0134
XML-LibXML-2.0200
XML-LibXML-2.0201
XML-LibXML-2.0202
XML-LibXML-2.0203
XML-LibXML-2.0204
XML-LibXML-2.0205
XML-LibXML-2.0206
XML-LibXML-2.0207
XML-LibXML-2.0208
XML-LibXML-2.0209

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8177.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "251233861508205667352620026061267131535",
                "286113945852023151768929507810220317871",
                "120669488110714837288389625059127390329",
                "75239443957947625182012626615737882570",
                "273301660499901045619552687991663180326",
                "253043014840330067116406570248640564420",
                "249690290860898743108620125333416840814",
                "234088775104684606799964163838566719705",
                "182612474031121277333541925751196450387"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-8177-81532aab",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/cpan-authors/xml-libxml/commit/15652bd905a6c9dda59a81b14d4766adbbae2ea8",
        "target": {
            "file": "dom.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "82096510015208679668102920451183007419",
            "length": 762
        },
        "id": "CVE-2026-8177-86f2a747",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/cpan-authors/xml-libxml/commit/15652bd905a6c9dda59a81b14d4766adbbae2ea8",
        "target": {
            "file": "dom.c",
            "function": "domParseChar"
        }
    }
]
vanir_signatures_modified 
"2026-09-20T14:16:33Z"