Vulnerability-Lookup

RLSA-2026:28290 (CVE-2026-4430)

Vulnerability from osv_rocky – Published: 2026-06-25 12:03 – Updated: 2026-07-09 12:06 – Source website

Summary

Moderate: libreoffice security update

Details

LibreOffice is an open source, community-developed office productivity suite. It includes key desktop applications, such as a word processor, a spreadsheet, a presentation manager, a formula editor, and a drawing program. LibreOffice replaces OpenOffice and provides a similar but enhanced and extended office suite.

Security Fix(es):

LibreOffice: LibreOffice: Denial of Service via crafted OOXML documents (CVE-2026-4430)

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.

Severity

7.6 (High)


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

Credits

Rocky Enterprise Software Foundation

Red Hat

References

URL

Type

	https://errata.rockylinux.org/RLSA-2026:28290	ADVISORY
	https://bugzilla.redhat.com/show_bug.cgi?id=2467657	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:9",
        "name": "libreoffice",
        "purl": "pkg:rpm/rocky-linux/libreoffice?distro=rocky-linux-9\u0026epoch=1"
      },
      "ranges": [
        {
          "database_specific": {
            "yum_repository": "AppStream"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:7.1.8.1-15.el9_8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "details": "LibreOffice is an open source, community-developed office productivity suite. It includes key desktop applications, such as a word processor, a spreadsheet, a presentation manager, a formula editor, and a drawing program. LibreOffice replaces OpenOffice and provides a similar but enhanced and extended office suite.\n\nSecurity Fix(es):\n\n* LibreOffice: LibreOffice: Denial of Service via crafted OOXML documents (CVE-2026-4430)\n\nFor 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.",
  "id": "RLSA-2026:28290",
  "modified": "2026-07-09T12:06:47.137653Z",
  "published": "2026-06-25T12:03:37.665962Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:28290"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467657"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Moderate: libreoffice security update",
  "upstream": [
    "CVE-2026-4430"
  ]
}

CVE-2026-4430 (GCVE-0-2026-4430)

Vulnerability from cvelistv5 – Published: 2026-05-07 07:16 – Updated: 2026-05-07 13:03

Title

Heap Buffer Overflow in AgileEngine

Summary

Out-of-bounds write vulnerability in The Document Foundation LibreOffice via crafted OOXML documents with mismatched encryption salt parameters. This issue affects LibreOffice: from 26.2 before 26.2.3, from 25.8 before 25.8.7.

Severity

5.4 (Medium)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-07 13:02 UTC

CWE

CWE-787 - Out-of-bounds write

Assigner

Document Fdn.

References

1 reference

URL	Tags
https://www.libreoffice.org/about-us/security/adv…

Impacted products

1 product

Vendor	Product	Version
The Document Foundation	LibreOffice	Affected: 26.2 , < 26.2.3 (26 series) Affected: 25.8 , < 25.8.7 (25 series)

Date Public

2026-05-06 15:42

Credits

Duc Anh Nguyen (@Danzation) Caolán McNamara <caolan.mcnamara@collabora.com>

Show details on NVD website

JSON

To clipboard

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  "containers": {
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        "metrics": [
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                "id": "CVE-2026-4430",
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                "timestamp": "2026-05-07T13:02:56.156578Z",
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.