CVE-2026-8358 (GCVE-0-2026-8358)

Vulnerability from cvelistv5 – Published: 2026-06-15 16:24 – Updated: 2026-06-16 19:27
VLAI
Title
Heap buffer overflow in spreadsheet tracked-changes import
Summary
LibreOffice Calc can import tracked changes from a spreadsheet document. A heap buffer overflow existed when a document reused the same change identifier for two different kinds of change. The importer then treated one change object as a different, larger type and wrote past the end of its allocation. In fixed versions records with a duplicate identifier are rejected.
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 (v2.0.3)
CWE
  • CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')
  • CWE-787 - Out-of-bounds Write
Assigner
References
Impacted products
Vendor Product Version
The Document Foundation LibreOffice Affected: 25.8 , < < 25.8.7 (26.2 series)
Affected: 26.2 , < < 26.2.4 (26.2 series)
Create a notification for this product.
Date Public
2026-06-15 00:00
Credits
Anthropic (automated discovery using Claude) Arthur Chan of Ada Logics (validation and reporting)
Show details on NVD website
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.