CVE-2026-8357

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory published 2026-06-15. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

LibreOffice Calc compiles cell formulas when opening a spreadsheet. A heap buffer overflow existed when compiling a very long formula made up of many opening tokens. The array that tracks nesting depth was allocated one element too small for that worst case, so such a formula wrote one element past its end. In fixed versions the array is sized to hold the largest possible nesting.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

June 15, 2026

Last Modified

July 23, 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-2026-8357

Vendor Advisories for CVE-2026-8357(6)

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

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuure-java (4:26.2.4.2-0ubuntu0.26.04.2) @ resolute2026-07-26ubuntu
redhatlibreoffice-1:7.1.8.1-15.el9_6.22026-07-22redhat
redhatlibreoffice-1:6.4.7.2-18.el8_8.22026-07-22redhat
redhatlibreoffice-1:7.1.8.1-14.el9_2.22026-07-22redhat
redhatlibreoffice-1:7.1.8.1-15.el9_4.22026-07-22redhat
redhatlibreoffice-1:6.4.7.2-18.el8_6.22026-07-22redhat
redhatlibreoffice-1:7.1.8.1-15.el9_8.22026-07-08redhat
redhatlibreoffice-1:6.4.7.2-21.el8_102026-07-06redhat

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.

Weakness Classification(3)

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

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 16× in last 7d / 100× 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 123 total refreshes for this CVE.

  1. 2026-07-27 07:50 UTCVendor advisory
  2. 2026-07-27 07:50 UTCGHSA enrichment
  3. 2026-07-26 20:13 UTCEG score recompute
  4. 2026-07-26 20:13 UTCVendor advisory
  5. 2026-07-26 20:13 UTCGHSA enrichment
  6. 2026-07-26 05:13 UTCEG score recompute
  7. 2026-07-26 05:13 UTCVendor advisory
  8. 2026-07-26 05:13 UTCGHSA enrichment
  9. 2026-07-25 14:18 UTCEPSS rescore
  10. 2026-07-24 14:18 UTCEPSS rescore
  11. 2026-07-23 14:18 UTCEPSS rescore
  12. 2026-07-23 03:23 UTCEG score recompute
  13. 2026-07-22 14:08 UTCEPSS rescore
  14. 2026-07-21 15:25 UTCEPSS rescore
  15. 2026-07-21 15:25 UTCEPSS rescore
  16. 2026-07-20 17:08 UTCEPSS rescore
  17. 2026-07-19 14:31 UTCEPSS rescore
  18. 2026-07-19 02:29 UTCEPSS rescore
  19. 2026-07-18 10:04 UTCEPSS rescore
  20. 2026-07-16 22:58 UTCVendor advisory
  21. 2026-07-16 22:58 UTCGHSA enrichment
  22. 2026-07-16 17:03 UTCEPSS rescore
  23. 2026-07-16 08:35 UTCVendor advisory
  24. 2026-07-16 08:35 UTCGHSA enrichment
  25. 2026-07-15 19:48 UTCVendor advisory
Show 75 more
  1. 2026-07-15 19:48 UTCGHSA enrichment
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 08:18 UTCVendor advisory
  4. 2026-07-15 08:18 UTCGHSA enrichment
  5. 2026-07-15 02:00 UTCEPSS rescore
  6. 2026-07-14 21:17 UTCVendor advisory
  7. 2026-07-14 21:17 UTCGHSA enrichment
  8. 2026-07-14 10:18 UTCVendor advisory
  9. 2026-07-14 10:18 UTCGHSA enrichment
  10. 2026-07-13 22:31 UTCEPSS rescore
  11. 2026-07-13 19:09 UTCVendor advisory
  12. 2026-07-13 19:09 UTCGHSA enrichment
  13. 2026-07-13 08:11 UTCVendor advisory
  14. 2026-07-13 08:11 UTCGHSA enrichment
  15. 2026-07-13 06:13 UTCEPSS rescore
  16. 2026-07-12 19:14 UTCVendor advisory
  17. 2026-07-12 19:14 UTCGHSA enrichment
  18. 2026-07-12 07:05 UTCVendor advisory
  19. 2026-07-12 07:05 UTCGHSA enrichment
  20. 2026-07-12 05:46 UTCEPSS rescore
  21. 2026-07-11 19:20 UTCVendor advisory
  22. 2026-07-11 19:20 UTCGHSA enrichment
  23. 2026-07-11 08:27 UTCEPSS rescore
  24. 2026-07-11 08:22 UTCVendor advisory
  25. 2026-07-11 08:22 UTCGHSA enrichment
  26. 2026-07-10 21:23 UTCVendor advisory
  27. 2026-07-10 21:23 UTCGHSA enrichment
  28. 2026-07-10 10:25 UTCVendor advisory
  29. 2026-07-10 10:25 UTCGHSA enrichment
  30. 2026-07-09 21:09 UTCVendor advisory
  31. 2026-07-09 21:09 UTCGHSA enrichment
  32. 2026-07-09 19:10 UTCEPSS rescore
  33. 2026-07-09 09:22 UTCVendor advisory
  34. 2026-07-09 09:22 UTCGHSA enrichment
  35. 2026-07-08 22:22 UTCVendor advisory
  36. 2026-07-08 22:22 UTCGHSA enrichment
  37. 2026-07-08 15:16 UTCEPSS rescore
  38. 2026-07-08 15:16 UTCEPSS rescore
  39. 2026-07-08 11:24 UTCVendor advisory
  40. 2026-07-08 11:24 UTCGHSA enrichment
  41. 2026-07-08 00:25 UTCVendor advisory
  42. 2026-07-08 00:25 UTCGHSA enrichment
  43. 2026-07-07 13:46 UTCEPSS rescore
  44. 2026-07-07 13:46 UTCEPSS rescore
  45. 2026-07-07 13:02 UTCVendor advisory
  46. 2026-07-07 13:02 UTCGHSA enrichment
  47. 2026-07-07 00:23 UTCVendor advisory
  48. 2026-07-07 00:23 UTCGHSA enrichment
  49. 2026-07-06 16:27 UTCEPSS rescore
  50. 2026-07-06 16:27 UTCEPSS rescore
  51. 2026-07-05 20:24 UTCGHSA enrichment
  52. 2026-07-05 09:26 UTCGHSA enrichment
  53. 2026-07-05 02:31 UTCEPSS rescore
  54. 2026-07-05 02:30 UTCEPSS rescore
  55. 2026-07-04 21:03 UTCGHSA enrichment
  56. 2026-07-04 10:04 UTCGHSA enrichment
  57. 2026-07-04 06:31 UTCEPSS rescore
  58. 2026-07-04 06:31 UTCEPSS rescore
  59. 2026-07-03 20:18 UTCGHSA enrichment
  60. 2026-07-03 09:20 UTCGHSA enrichment
  61. 2026-07-02 22:20 UTCGHSA enrichment
  62. 2026-07-02 11:18 UTCGHSA enrichment
  63. 2026-07-02 00:05 UTCGHSA enrichment
  64. 2026-07-01 15:07 UTCEPSS rescore
  65. 2026-07-01 13:07 UTCGHSA enrichment
  66. 2026-07-01 02:09 UTCEG score recompute▲ 2.40
  67. 2026-07-01 02:09 UTCGHSA enrichment
  68. 2026-06-30 23:22 UTCEPSS rescore
  69. 2026-06-30 04:33 UTCNVD updateCVSS v3 → 7.8 · severity → HIGH
  70. 2026-06-30 01:41 UTCGHSA enrichment
  71. 2026-06-29 14:06 UTCEPSS rescore
  72. 2026-06-29 01:14 UTCGHSA enrichment
  73. 2026-06-28 14:07 UTCEPSS rescore
  74. 2026-06-28 04:56 UTCEPSS rescore
  75. 2026-06-28 00:46 UTCGHSA enrichment

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-8357?
CVE-2026-8357 is a high vulnerability published on June 15, 2026. LibreOffice Calc compiles cell formulas when opening a spreadsheet. A heap buffer overflow existed when compiling a very long formula made up of many opening tokens. The array that tracks nesting depth was allocated one element too small for that worst case, so such a formula wrote one element past…
When was CVE-2026-8357 disclosed?
CVE-2026-8357 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8357 actively exploited?
CVE-2026-8357 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 95.3% of all scored CVEs.
What is the CVSS score of CVE-2026-8357?
CVE-2026-8357 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-8357?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8357, 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

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