CVE-2026-8358

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 93% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cna:document fdn., epss
Trending — 3 sources updated this week
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.4
EG Score
5.4(medium)
EPSS
6.8%
KEV
Not listed

Published

June 15, 2026

Last Modified

June 16, 2026

Advisory Details (1)

Auto-updated Jun 15, 2026
No patch confirmed yet.
generic

Security advisories — LibreOffice

https://www.libreoffice.org/about-us/security/advisories/cve-2026-8358

Vendor Advisories for CVE-2026-8358(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 22× in last 7d / 63× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-07 00:23 UTCEG score recompute
  2. 2026-07-07 00:23 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 13:02 UTCEG score recompute
  8. 2026-07-05 13:02 UTCGHSA enrichment
  9. 2026-07-05 02:31 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-04 10:32 UTCEG score recompute
  12. 2026-07-04 10:32 UTCGHSA enrichment
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-04 06:31 UTCEPSS rescore
  15. 2026-07-03 08:09 UTCEG score recompute
  16. 2026-07-03 08:09 UTCGHSA enrichment
  17. 2026-07-02 05:42 UTCEG score recompute
  18. 2026-07-02 05:42 UTCGHSA enrichment
  19. 2026-07-01 15:07 UTCEPSS rescore
  20. 2026-07-01 03:22 UTCEG score recompute
  21. 2026-07-01 03:22 UTCGHSA enrichment
  22. 2026-06-30 23:22 UTCEPSS rescore
  23. 2026-06-30 01:02 UTCEG score recompute
  24. 2026-06-30 01:02 UTCGHSA enrichment
  25. 2026-06-29 14:06 UTCEPSS rescore
Show 38 more
  1. 2026-06-28 22:42 UTCEG score recompute
  2. 2026-06-28 22:42 UTCGHSA enrichment
  3. 2026-06-28 14:07 UTCEPSS rescore
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-27 20:22 UTCEG score recompute
  6. 2026-06-27 20:22 UTCGHSA enrichment
  7. 2026-06-27 03:08 UTCEPSS rescore
  8. 2026-06-26 18:02 UTCEG score recompute
  9. 2026-06-26 18:02 UTCGHSA enrichment
  10. 2026-06-25 15:42 UTCEG score recompute
  11. 2026-06-25 15:42 UTCGHSA enrichment
  12. 2026-06-25 13:50 UTCEPSS rescore
  13. 2026-06-24 14:05 UTCEPSS rescore
  14. 2026-06-24 13:21 UTCEG score recompute
  15. 2026-06-24 13:21 UTCGHSA enrichment
  16. 2026-06-23 21:33 UTCEPSS rescore
  17. 2026-06-23 10:41 UTCEG score recompute
  18. 2026-06-23 10:41 UTCGHSA enrichment
  19. 2026-06-22 14:25 UTCEPSS rescore
  20. 2026-06-22 08:15 UTCEG score recompute
  21. 2026-06-22 08:15 UTCGHSA enrichment
  22. 2026-06-21 14:56 UTCEPSS rescore
  23. 2026-06-21 05:54 UTCEG score recompute
  24. 2026-06-21 05:54 UTCGHSA enrichment
  25. 2026-06-21 01:59 UTCEPSS rescore
  26. 2026-06-20 03:32 UTCEG score recompute
  27. 2026-06-20 03:32 UTCGHSA enrichment
  28. 2026-06-19 19:26 UTCEPSS rescore
  29. 2026-06-19 00:55 UTCEG score recompute
  30. 2026-06-19 00:55 UTCGHSA enrichment
  31. 2026-06-17 22:33 UTCEG score recompute
  32. 2026-06-17 22:33 UTCGHSA enrichment
  33. 2026-06-17 17:53 UTCEPSS rescore
  34. 2026-06-16 20:13 UTCEG score recompute
  35. 2026-06-16 20:13 UTCGHSA enrichment
  36. 2026-06-16 17:53 UTCEPSS rescore
  37. 2026-06-15 17:54 UTCEG score recompute
  38. 2026-06-15 17:53 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8358?
CVE-2026-8358 is a medium vulnerability published on June 15, 2026. 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…
When was CVE-2026-8358 disclosed?
CVE-2026-8358 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8358 actively exploited?
CVE-2026-8358 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8358?
CVE-2026-8358 has a CVSS v4.0 base score of 5.4 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-8358?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8358, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-8358

Explore →

Is Your Infrastructure Affected by CVE-2026-8358?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs