CVE-2026-8356

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 98% 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: epss, secondary
Trending — 4 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: None knownExposed: 0

A fix is available — apply it.

LibreOffice can import presentations in the legacy binary PPT format. A stack buffer overflow existed when importing a colour-replacement record. Two fixed-size colour tables were filled from the file, but the write position was not reset between the two passes over the record, so a file whose combined colour counts exceeded the table size wrote past the end of the tables on the stack. In fixed versions the unused second pass is no longer read into those tables.

CVSS v3
5.4
EG Score
5.4(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

June 15, 2026

Last Modified

June 15, 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-2026-8356

Vendor Advisories for CVE-2026-8356(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuure-java (4:26.2.4.2-0ubuntu0.26.04.2) @ resolute2026-09-14ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libreoffice1:7.0.4-4 ... 4:7.6.4~rc1-1~bpo12+1 (402 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libreoffice4:7.4.5-3 ... 4:7.4.7-1~bpo11+1 (17 versions)4:7.4.7-1+deb12u13—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libreoffice4:25.2.3-2 ... 4:25.2.3-2+deb13u5~bpo12+1 (8 versions)4:25.2.3-2+deb13u5—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libreoffice4:25.2.3-2 ... 4:26.2.4.2-1~bpo13+1 (54 versions)4:26.2.4.2-1—

Weakness Classification(2)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 8× in last 7d / 44× 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.

Showing the most recent 100 of 196 total refreshes for this CVE.

  1. 2026-09-16 05:15 UTCEPSS rescore
  2. 2026-09-15 03:12 UTCEPSS rescore
  3. 2026-09-14 03:47 UTCEG score recompute
  4. 2026-09-14 03:47 UTCVendor advisory
  5. 2026-09-14 03:46 UTCGHSA enrichment
  6. 2026-09-13 16:48 UTCEPSS rescore
  7. 2026-09-12 15:02 UTCEPSS rescore
  8. 2026-09-11 14:53 UTCEPSS rescore
  9. 2026-09-08 22:01 UTCEPSS rescore
  10. 2026-09-06 13:48 UTCEPSS rescore
  11. 2026-09-05 15:31 UTCEPSS rescore
  12. 2026-09-04 05:07 UTCEPSS rescore
  13. 2026-09-02 14:12 UTCEPSS rescore
  14. 2026-09-01 13:54 UTCEPSS rescore
  15. 2026-09-01 04:40 UTCEPSS rescore
  16. 2026-08-30 22:59 UTCEG score recompute
  17. 2026-08-30 22:59 UTCVendor advisory
  18. 2026-08-30 22:59 UTCGHSA enrichment
  19. 2026-08-30 19:18 UTCEPSS rescore
  20. 2026-08-28 21:42 UTCEPSS rescore
  21. 2026-08-27 14:25 UTCEPSS rescore
  22. 2026-08-26 14:47 UTCEPSS rescore
  23. 2026-08-25 13:49 UTCEPSS rescore
  24. 2026-08-24 23:38 UTCEG score recompute
  25. 2026-08-24 23:38 UTCVendor advisory
Show 75 more
  1. 2026-08-24 23:38 UTCGHSA enrichment
  2. 2026-08-24 14:18 UTCEPSS rescore
  3. 2026-08-23 09:48 UTCEG score recompute
  4. 2026-08-23 09:48 UTCVendor advisory
  5. 2026-08-23 09:48 UTCGHSA enrichment
  6. 2026-08-23 00:19 UTCEPSS rescore
  7. 2026-08-21 17:46 UTCEG score recompute
  8. 2026-08-21 17:46 UTCVendor advisory
  9. 2026-08-21 17:46 UTCGHSA enrichment
  10. 2026-08-20 22:56 UTCEPSS rescore
  11. 2026-08-20 16:22 UTCEG score recompute
  12. 2026-08-20 16:22 UTCVendor advisory
  13. 2026-08-20 16:22 UTCGHSA enrichment
  14. 2026-08-19 17:04 UTCEPSS rescore
  15. 2026-08-19 13:15 UTCEG score recompute
  16. 2026-08-19 13:15 UTCVendor advisory
  17. 2026-08-19 13:15 UTCGHSA enrichment
  18. 2026-08-18 13:49 UTCEPSS rescore
  19. 2026-08-18 13:49 UTCEPSS rescore
  20. 2026-08-17 07:15 UTCEG score recompute
  21. 2026-08-17 07:15 UTCVendor advisory
  22. 2026-08-17 07:15 UTCGHSA enrichment
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-16 14:56 UTCEPSS rescore
  25. 2026-08-16 06:13 UTCEG score recompute
  26. 2026-08-16 06:13 UTCVendor advisory
  27. 2026-08-16 06:13 UTCGHSA enrichment
  28. 2026-08-16 02:15 UTCEPSS rescore
  29. 2026-08-15 05:11 UTCEG score recompute
  30. 2026-08-15 05:11 UTCVendor advisory
  31. 2026-08-15 05:11 UTCGHSA enrichment
  32. 2026-08-15 01:31 UTCEPSS rescore
  33. 2026-08-14 04:06 UTCEG score recompute
  34. 2026-08-14 04:06 UTCVendor advisory
  35. 2026-08-14 04:06 UTCGHSA enrichment
  36. 2026-08-13 22:00 UTCEPSS rescore
  37. 2026-08-13 03:03 UTCEG score recompute
  38. 2026-08-13 03:03 UTCVendor advisory
  39. 2026-08-13 03:03 UTCGHSA enrichment
  40. 2026-08-12 13:51 UTCEPSS rescore
  41. 2026-08-12 02:01 UTCEG score recompute
  42. 2026-08-12 02:01 UTCVendor advisory
  43. 2026-08-12 02:01 UTCGHSA enrichment
  44. 2026-08-11 13:43 UTCEPSS rescore
  45. 2026-08-11 00:58 UTCEG score recompute
  46. 2026-08-11 00:58 UTCVendor advisory
  47. 2026-08-11 00:58 UTCGHSA enrichment
  48. 2026-08-11 00:00 UTCEPSS rescore
  49. 2026-08-09 23:55 UTCEG score recompute
  50. 2026-08-09 23:55 UTCVendor advisory
  51. 2026-08-09 23:55 UTCGHSA enrichment
  52. 2026-08-09 13:47 UTCEPSS rescore
  53. 2026-08-08 22:53 UTCEG score recompute
  54. 2026-08-08 22:53 UTCVendor advisory
  55. 2026-08-08 22:53 UTCGHSA enrichment
  56. 2026-08-08 16:37 UTCEPSS rescore
  57. 2026-08-07 21:50 UTCEG score recompute
  58. 2026-08-07 21:50 UTCVendor advisory
  59. 2026-08-07 21:50 UTCGHSA enrichment
  60. 2026-08-06 20:48 UTCEG score recompute
  61. 2026-08-06 20:48 UTCVendor advisory
  62. 2026-08-06 20:48 UTCGHSA enrichment
  63. 2026-08-06 13:47 UTCEPSS rescore
  64. 2026-08-05 19:45 UTCEG score recompute
  65. 2026-08-05 19:45 UTCVendor advisory
  66. 2026-08-05 19:45 UTCGHSA enrichment
  67. 2026-08-05 19:17 UTCEPSS rescore
  68. 2026-08-05 19:17 UTCEPSS rescore
  69. 2026-08-04 15:46 UTCEG score recompute
  70. 2026-08-04 15:46 UTCVendor advisory
  71. 2026-08-04 15:46 UTCGHSA enrichment
  72. 2026-08-04 10:39 UTCEPSS rescore
  73. 2026-08-03 14:44 UTCEG score recompute
  74. 2026-08-03 14:44 UTCVendor advisory
  75. 2026-08-03 14:44 UTCGHSA enrichment

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-8356?
CVE-2026-8356 is a medium vulnerability published on June 15, 2026. LibreOffice can import presentations in the legacy binary PPT format. A stack buffer overflow existed when importing a colour-replacement record. Two fixed-size colour tables were filled from the file, but the write position was not reset between the two passes over the record, so a file whose…
When was CVE-2026-8356 disclosed?
CVE-2026-8356 was first published in the National Vulnerability Database on June 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8356 actively exploited?
CVE-2026-8356 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 98.0% of all scored CVEs.
What is the CVSS score of CVE-2026-8356?
CVE-2026-8356 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-8356?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8356, 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.

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