Vulnerability-Lookup

RHSA-2026:39553

Vulnerability from csaf_redhat - Published: 2026-07-15 00:16 - Updated: 2026-07-15 04:57

Summary

Red Hat Security Advisory: perl-XML-LibXML security update

Severity

Important

Notes

Topic: An update for perl-XML-LibXML is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: This module implements a Perl interface to the GNOME libxml2 library which provides interfaces for parsing and manipulating XML files. This module allows Perl programmers to make use of the highly capable validating XML parser and the high performance DOM implementation. Security Fix(es): * perl-XML-LibXML: XML::LibXML: Denial of Service via truncated UTF-8 in XML node names (CVE-2026-8177) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-8177

A flaw was found in XML::LibXML for Perl. A remote attacker could exploit this vulnerability when processing specially crafted XML node names containing incomplete UTF-8 character sequences. This can lead to an out-of-bounds read in heap memory, potentially causing the application to crash and resulting in a denial of service.

7.5 (High)


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

CWE-125 - Out-of-bounds Read

Affected products

Fixed 13 products

Product	Version	Remediation
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:perl-XML-LibXML-1:2.0206-5.el9_8.1.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:perl-XML-LibXML-1:2.0206-5.el9_8.1.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:perl-XML-LibXML-1:2.0206-5.el9_8.1.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:perl-XML-LibXML-1:2.0206-5.el9_8.1.src	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:perl-XML-LibXML-1:2.0206-5.el9_8.1.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:perl-XML-LibXML-debuginfo-1:2.0206-5.el9_8.1.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:perl-XML-LibXML-debuginfo-1:2.0206-5.el9_8.1.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:perl-XML-LibXML-debuginfo-1:2.0206-5.el9_8.1.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:perl-XML-LibXML-debuginfo-1:2.0206-5.el9_8.1.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:perl-XML-LibXML-debugsource-1:2.0206-5.el9_8.1.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:perl-XML-LibXML-debugsource-1:2.0206-5.el9_8.1.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:perl-XML-LibXML-debugsource-1:2.0206-5.el9_8.1.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:perl-XML-LibXML-debugsource-1:2.0206-5.el9_8.1.x86_64	—	Vendor Fix fix Workaround

Threats

Impact Important

References

10 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:39553	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2468684	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-8177	self
https://bugzilla.redhat.com/show_bug.cgi?id=2468684	external
https://www.cve.org/CVERecord?id=CVE-2026-8177	external
https://nvd.nist.gov/vuln/detail/CVE-2026-8177	external
https://github.com/cpan-authors/XML-LibXML/commit…	external
https://github.com/cpan-authors/XML-LibXML/issues/146	external

JSON

To clipboard

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

Vulnerability from cvelistv5 – Published: 2026-05-10 20:48 – Updated: 2026-07-15 00:39

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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-125 - Out-of-bounds Read

Assigner

CPANSec

References

8 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
http://www.openwall.com/lists/oss-security/2026/05/10/8
http://www.openwall.com/lists/oss-security/2026/05/11/2
https://access.redhat.com/security/cve/CVE-2026-8177	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2468684	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex

Impacted products

7 products

Vendor	Product	Version
SHLOMIF	XML::LibXML	Affected: 0 , ≤ 2.0210 (custom)
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Show details on NVD website

JSON

To clipboard

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          "defaultStatus": "unaffected",
          "packageName": "XML-LibXML",
          "product": "XML::LibXML",
          "programFiles": [
            "dom.c"
          ],
          "repo": "https://github.com/cpan-authors/XML-LibXML",
          "vendor": "SHLOMIF",
          "versions": [
            {
              "lessThanOrEqual": "2.0210",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125 Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-10T23:33:30.265Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/cpan-authors/XML-LibXML/issues/146"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/cpan-authors/XML-LibXML/pull/149"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/cpan-authors/XML-LibXML/commit/15652bd905a6c9dda59a81b14d4766adbbae2ea8.patch"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to a future XML::LibXML release, or apply the upstream patch."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-08T00:00:00.000Z",
          "value": "Patch submitted in upstream PR."
        }
      ],
      "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",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-8177",
    "datePublished": "2026-05-10T20:48:51.816Z",
    "dateReserved": "2026-05-08T15:36:17.532Z",
    "dateUpdated": "2026-07-15T00:39:36.593Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

RHSA-2026:39553

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

Tags

Sightings

Nomenclature