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
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

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
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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%
EPSS PROB
0.2%
EPSS %ILE
12th
KEV
Not listed

Published

June 15, 2026

Last Modified

July 28, 2026

Advisory Details (1)

Auto-updated Jun 15, 2026
Patch available.
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(10)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuure-java (4:26.2.4.2-0ubuntu0.26.04.2) @ resolute2026-09-14ubuntu
redhatlibreoffice-1:5.3.6.1-28.el7_92026-07-27redhat
redhatlibreoffice-1:6.4.7.2-18.el8_4.22026-07-27redhat
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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
libreoffice1:7.0.4-4 ... 4:7.6.4~rc1-1~bpo12+1 (402 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libreoffice4:7.4.5-3 ... 4:7.4.7-1~bpo11+1 (17 versions)
  • every version up to 4:7.4.7-1+deb12u13: fixed in 4:7.4.7-1+deb12u13
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libreoffice4:25.2.3-2 ... 4:25.2.3-2+deb13u5~bpo12+1 (8 versions)
  • every version up to 4:25.2.3-2+deb13u5: fixed in 4:25.2.3-2+deb13u5
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libreoffice4:25.2.3-2 ... 4:26.2.4.2-1~bpo13+1 (54 versions)
  • every version up to 4:26.2.4.2-1: fixed in 4:26.2.4.2-1
—

Weakness Classification(3)

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

Additional Vendor Advisories

(5)

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 6× in last 7d / 28× 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 317 total refreshes for this CVE.

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

Related CVEs(same product + 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 on June 15, 2026, with the most recent update on July 28, 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 0.2% probability of exploitation in the next 30 days (12th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-8357?
CVE-2026-8357 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-8357?
A fix for CVE-2026-8357 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-8357 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-8357

Explore →

Is Your Infrastructure Affected by CVE-2026-8357?

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

Book a Demo →Browse All CVEs