Vulnerability-Lookup

CVE-2026-8177 (GCVE-0-2026-8177)

Vulnerability from cvelistv5 – Published: 2026-05-10 20:48 – Updated: 2026-05-11 16:53

Title

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

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. 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.

Severity ?

7.5 (High)


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

CWE

CWE-125 - Out-of-bounds Read

Assigner

CPANSec

References

3 references

URL	Tags
https://github.com/cpan-authors/XML-LibXML/issues/146	issue-tracking
https://github.com/cpan-authors/XML-LibXML/pull/149	issue-tracking
https://github.com/cpan-authors/XML-LibXML/commit…	patch

Impacted products

1 product

Vendor	Product	Version
SHLOMIF	XML::LibXML	Affected: 0 , ≤ 2.0210 (custom)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-8177

Vulnerability from fkie_nvd - Published: 2026-05-10 21:16 - Updated: 2026-05-12 16:48

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://github.com/cpan-authors/XML-LibXML/commit/15652bd905a6c9dda59a81b14d4766adbbae2ea8.patch
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://github.com/cpan-authors/XML-LibXML/issues/146
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://github.com/cpan-authors/XML-LibXML/pull/149
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/05/10/8
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/05/11/2

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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  "cveTags": [],
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      "lang": "en",
      "value": "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.\n\nA 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.\n\nAny Perl process that passes attacker controlled strings to XML::LibXML\u0027s DOM node-name methods can reach this path on the default API. The likely consequence is a crash, causing denial of service."
    }
  ],
  "id": "CVE-2026-8177",
  "lastModified": "2026-05-12T16:48:58.260",
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        "type": "Secondary"
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  "published": "2026-05-10T21:16:30.003",
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      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://github.com/cpan-authors/XML-LibXML/issues/146"
    },
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      "type": "Secondary"
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}

GHSA-G5H8-X64V-QF5H

Vulnerability from github – Published: 2026-05-10 21:30 – Updated: 2026-05-11 18:31

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.

Severity ?

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-8177"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-10T21:16:30Z",
    "severity": "HIGH"
  },
  "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.\n\nA 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.\n\nAny Perl process that passes attacker controlled strings to XML::LibXML\u0027s DOM node-name methods can reach this path on the default API. The likely consequence is a crash, causing denial of service.",
  "id": "GHSA-g5h8-x64v-qf5h",
  "modified": "2026-05-11T18:31:42Z",
  "published": "2026-05-10T21:30:23Z",
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    },
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    },
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}

MSRC_CVE-2026-8177

Vulnerability from csaf_microsoft - Published: 2026-05-02 00:00 - Updated: 2026-05-13 01:05

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

Notes

Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

CVE-2026-8177

CWE-125 - Out-of-bounds Read

Affected products

Known affected 1 product

Product	Identifier	Version	Remediation
Unresolved product id: 17084-1		—	None Available

References

4 references

URL	Category
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self
https://support.microsoft.com/lifecycle	external
https://www.first.org/cvss	external
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self

JSON

To clipboard

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
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    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
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    ],
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      "contact_details": "secure@microsoft.com",
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        "summary": "CVE-2026-8177 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 - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-8177.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
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        "summary": "Common Vulnerability Scoring System",
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      }
    ],
    "title": "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",
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                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "azl3 perl-XML-LibXML 0:2.0209-2.azl3",
                "product": {
                  "name": "azl3 perl-XML-LibXML 0:2.0209-2.azl3",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "perl-XML-LibXML"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 perl-XML-LibXML 0:2.0209-2.azl3 as a component of Azure Linux 3.0",
          "product_id": "17084-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-8177",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "notes": [
        {
          "category": "general",
          "text": "CPANSec",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "known_affected": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-8177 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 - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-8177.json"
        }
      ],
      "remediations": [
        {
          "category": "none_available",
          "date": "2026-05-13T01:05:27.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-1"
          ]
        }
      ],
      "title": "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"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-8177 (GCVE-0-2026-8177)

FKIE_CVE-2026-8177

GHSA-G5H8-X64V-QF5H

MSRC_CVE-2026-8177

Tags

Sightings

Nomenclature