CVE-2026-8357 (GCVE-0-2026-8357)

Vulnerability from cvelistv5 – Published: 2026-06-15 16:23 – Updated: 2026-07-28 12:04
VLAI
Title
Heap buffer overflow in Calc formula compilation
Summary
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.
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
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-787 - Out-of-bounds Write
  • CWE-193 - Off-by-one Error
  • CWE-131 - Incorrect Calculation of Buffer Size
Assigner
References
Impacted products
Vendor Product Version
The Document Foundation LibreOffice Affected: 26.2 , < < 26.2.4 (26.2 series)
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Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support Unaffected: 1:5.3.6.1-28.el7_9 , < * (rpm)
    cpe:/o:redhat:rhel_els:7
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 1:6.4.7.2-21.el8_10 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 1:6.4.7.2-18.el8_4.2 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4
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Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 1:6.4.7.2-18.el8_4.2 , < * (rpm)
    cpe:/a:redhat:rhel_eus_long_life:8.4
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Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 1:6.4.7.2-18.el8_6.2 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6
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Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Unaffected: 1:6.4.7.2-18.el8_6.2 , < * (rpm)
    cpe:/a:redhat:rhel_eus_long_life:8.6
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 1:6.4.7.2-18.el8_8.2 , < * (rpm)
    cpe:/a:redhat:rhel_tus:8.8
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Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 1:6.4.7.2-18.el8_8.2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 1:7.1.8.1-15.el9_8.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 1:7.1.8.1-14.el9_2.2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2
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Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Unaffected: 1:7.1.8.1-15.el9_4.2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.4
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 1:7.1.8.1-15.el9_6.2 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6
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Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
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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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      "cveMetadata": "{\"cveId\": \"CVE-2026-8357\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-28T12:04:37.638Z\", \"dateReserved\": \"2026-05-11T18:55:27.138Z\", \"assignerOrgId\": \"4fe7d05b-1353-44cc-8b7a-1e416936dff2\", \"datePublished\": \"2026-06-15T16:23:37.518Z\", \"assignerShortName\": \"Document Fdn.\"}",
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  }
}



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Taxonomy of the tags.





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.