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CVE-2024-5261

TLS certificate are not properly verified when utilizing LibreOfficeKit

10.0 CriticalFix available

Improper Certificate Validation vulnerability in LibreOffice "LibreOfficeKit" mode disables TLS certification verification

LibreOfficeKit can be used for accessing LibreOffice functionality through C/C++. Typically this is used by third party components to reuse LibreOffice as a library to convert, view or otherwise interact with documents.

LibreOffice internally makes use of "curl" to fetch remote resources such as images hosted on webservers.

In affected versions of LibreOffice, when used in LibreOfficeKit mode only, then curl's TLS certification verification was disabled (CURLOPT_SSL_VERIFYPEER of false)

In the fixed versions curl operates in LibreOfficeKit mode the same as in standard mode with CURLOPT_SSL_VERIFYPEER of true.

This issue affects LibreOffice before version 24.2.4.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.43%Up 0.4 points since Jun 26, 2024
90%50%10%1%

What each source reports

CVE List Score used 10.0

TLS certificate are not properly verified when utilizing LibreOfficeKit

Improper Certificate Validation vulnerability in LibreOffice "LibreOfficeKit" mode disables TLS certification verification

LibreOfficeKit can be used for accessing LibreOffice functionality through C/C++. Typically this is used by third party components to reuse LibreOffice as a library to convert, view or otherwise interact with documents.

LibreOffice internally makes use of "curl" to fetch remote resources such as images hosted on webservers.

In affected versions of LibreOffice, when used in LibreOfficeKit mode only, then curl's TLS certification verification was disabled (CURLOPT_SSL_VERIFYPEER of false)

In the fixed versions curl operates in LibreOfficeKit mode the same as in standard mode with CURLOPT_SSL_VERIFYPEER of true.

This issue affects LibreOffice before version 24.2.4.

Record
CVE-2024-5261
CVSS 4.0
10.0 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Weakness
CWE-295
Updated
2026-11-02
EUVDEUVD-2024-46499 10.0

Improper Certificate Validation vulnerability in LibreOffice "LibreOfficeKit" mode disables TLS certification verification

LibreOfficeKit can be used for accessing LibreOffice functionality through C/C++. Typically this is used by third party components to reuse LibreOffice as a library to convert, view or otherwise interact with documents.

LibreOffice internally makes use of "curl" to fetch remote resources such as images hosted on webservers.

In affected versions of LibreOffice, when used in LibreOfficeKit mode only, then curl's TLS certification verification was disabled (CURLOPT_SSL_VERIFYPEER of false)

In the fixed versions curl operates in LibreOfficeKit mode the same as in standard mode with CURLOPT_SSL_VERIFYPEER of true.

This issue affects LibreOffice before version 24.2.4.

Record
EUVD-2024-46499
CVSS 4.0
10.0 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-rvcj-9xfm-m9hr 10.0

Improper Certificate Validation vulnerability in LibreOffice "LibreOfficeKit" mode disables TLS...

Improper Certificate Validation vulnerability in LibreOffice "LibreOfficeKit" mode disables TLS certification verification

LibreOfficeKit can be used for accessing LibreOffice functionality through C/C++. Typically this is used by third party components to reuse LibreOffice as a library to convert, view or otherwise interact with documents.

LibreOffice internally makes use of "curl" to fetch remote resources such as images hosted on webservers.

In affected versions of LibreOffice, when used in LibreOfficeKit mode only, then curl's TLS certification verification was disabled (CURLOPT_SSL_VERIFYPEER of false)

In the fixed versions curl operates in LibreOfficeKit mode the same as in standard mode with CURLOPT_SSL_VERIFYPEER of true.

This issue affects LibreOffice before version 24.2.4.

Record
GHSA-rvcj-9xfm-m9hr
CVSS 4.0
10.0 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-295
Updated
2026-11-02
NVD 10.0

Improper Certificate Validation vulnerability in LibreOffice "LibreOfficeKit" mode disables TLS certification verification

LibreOfficeKit can be used for accessing LibreOffice functionality through C/C++. Typically this is used by third party components to reuse LibreOffice as a library to convert, view or otherwise interact with documents.

LibreOffice internally makes use of "curl" to fetch remote resources such as images hosted on webservers.

In affected versions of LibreOffice, when used in LibreOfficeKit mode only, then curl's TLS certification verification was disabled (CURLOPT_SSL_VERIFYPEER of false)

In the fixed versions curl operates in LibreOfficeKit mode the same as in standard mode with CURLOPT_SSL_VERIFYPEER of true.

This issue affects LibreOffice before version 24.2.4.

Record
CVE-2024-5261
CVSS 4.0
10.0 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-295
Updated
2026-11-02
OSVBELL-CVE-2024-5261 9.8
Record
BELL-CVE-2024-5261
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSV 9.8

Improper Certificate Validation vulnerability in LibreOffice "LibreOfficeKit" mode disables TLS certification verification

LibreOfficeKit can be used for accessing LibreOffice functionality through C/C++. Typically this is used by third party components to reuse LibreOffice as a library to convert, view or otherwise interact with documents.

LibreOffice internally makes use of "curl" to fetch remote resources such as images hosted on webservers.

In affected versions of LibreOffice, when used in LibreOfficeKit mode only, then curl's TLS certification verification was disabled (CURLOPT_SSL_VERIFYPEER of false)

In the fixed versions curl operates in LibreOfficeKit mode the same as in standard mode with CURLOPT_SSL_VERIFYPEER of true.

This issue affects LibreOffice before version 24.2.4.

Record
CVE-2024-5261
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 7 moreShow less
OSVDEBIAN-CVE-2024-5261 9.8

Improper Certificate Validation vulnerability in LibreOffice "LibreOfficeKit" mode disables TLS certification verification LibreOfficeKit can be used for accessing LibreOffice functionality through C/C++. Typically this is used by third party components to reuse LibreOffice as a library to convert, view or otherwise interact with documents. LibreOffice internally makes use of "curl" to fetch remote resources such as images hosted on webservers. In affected versions of LibreOffice, when used in LibreOfficeKit mode only, then curl's TLS certification verification was disabled (CURLOPT_SSL_VERIFYPEER of false) In the fixed versions curl operates in LibreOfficeKit mode the same as in standard mode with CURLOPT_SSL_VERIFYPEER of true. This issue affects LibreOffice before version 24.2.4.

Record
DEBIAN-CVE-2024-5261
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2024-5261 10.0

Improper Certificate Validation vulnerability in LibreOffice "LibreOfficeKit" mode disables TLS certification verification LibreOfficeKit can be used for accessing LibreOffice functionality through C/C++. Typically this is used by third party components to reuse LibreOffice as a library to convert, view or otherwise interact with documents. LibreOffice internally makes use of "curl" to fetch remote resources such as images hosted on webservers. In affected versions of LibreOffice, when used in LibreOfficeKit mode only, then curl's TLS certification verification was disabled (CURLOPT_SSL_VERIFYPEER of false) In the fixed versions curl operates in LibreOfficeKit mode the same as in standard mode with CURLOPT_SSL_VERIFYPEER of true. This issue affects LibreOffice before version 24.2.4.

Record
UBUNTU-CVE-2024-5261
CVSS 4.0
10.0 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVMGASA-2024-0268 No score

Updated libreoffice packages fix security vulnerability

TLS certificates are not properly verified when utilizing LibreOfficeKit. (CVE-2024-5261)

Record
MGASA-2024-0268
Updated
2026-11-02
OSVopenSUSE-SU-2024:14186-1 No score

libreoffice-24.2.5.2-1.1 on GA media

These are all security issues fixed in the libreoffice-24.2.5.2-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:14186-1
Updated
2026-11-02
OSVSUSE-SU-2024:3576-1 No score

Security update for libreoffice

This update for libreoffice fixes the following issues:

libreoffice was updated to version 24.8.1.2 (jsc#PED-10362):

  • Release notes:

  • Security issues fixed:

    • CVE-2024-526: Fixed TLS certificates are not properly verified when utilizing LibreOfficeKit (bsc#1226975)

  • Other bugs fixed:

    • Use system curl instead of the bundled one on systems greater than or equal to SLE15 (bsc#1229589)
    • Use the new clucene function, which makes index files reproducible (bsc#1047218)

  • Update bundled dependencies:

    • Java-Websocket updated from 1.5.4 to 1.5.6
    • boost updated from 1.82.0 to 1.85.0
    • curl updated from 8.7.1 to 8.9.1
    • fontconfig updated from 2.14.2 to 2.15.0
    • freetype updated from 2.13.0 to 2.13.2
    • harfbuzz updated from 8.2.2 to 8.5.0
    • icu4c-data updated from 73.2 to 74.2
    • icu4c-src updated from 73.2 to 74.2
    • libassuan updated from 2.5.7 to 3.0.1
    • libcmis updated from 0.6.1 to 0.6.2
    • libgpg-error updated from 1.48 to 1.50
    • pdfium updated from 6179 to 6425
    • poppler updated from 23.09.0 to 24.08.0
    • tiff updated from 4.6.0 to 4.6.0t
Record
SUSE-SU-2024:3576-1
Updated
2026-11-02
OSVSUSE-SU-2024:3577-1 No score

Security update for libreoffice

This update for libreofficefixes the following issues:

libreoffice was updated to version 24.8.1.2 (jsc#PED-10362):

  • Release notes:

  • Security issues fixed:

    • CVE-2024-526: Fixed TLS certificates are not properly verified when utilizing LibreOfficeKit (bsc#1226975)

  • Other bugs fixed:

    • Use system curl instead of the bundled one on systems greater than or equal to SLE15 (bsc#1229589)
    • Use the new clucene function, which makes index files reproducible (bsc#1047218)
    • Support firebird database with new package libreoffice-base-drivers-firebird in Package Hub and openSUSE Leap (bsc#1225597)

  • Update bundled dependencies:

    • Java-Websocket updated from 1.5.4 to 1.5.6
    • boost updated from 1.82.0 to 1.85.0
    • curl updated from 8.7.1 to 8.9.1
    • fontconfig updated from 2.14.2 to 2.15.0
    • freetype updated from 2.13.0 to 2.13.2
    • harfbuzz updated from 8.2.2 to 8.5.0
    • icu4c-data updated from 73.2 to 74.2
    • icu4c-src updated from 73.2 to 74.2
    • libassuan updated from 2.5.7 to 3.0.1
    • libcmis updated from 0.6.1 to 0.6.2
    • libgpg-error updated from 1.48 to 1.50
    • pdfium updated from 6179 to 6425
    • poppler updated from 23.09.0 to 24.08.0
    • tiff updated from 4.6.0 to 4.6.0t
Record
SUSE-SU-2024:3577-1
Updated
2026-11-02
OSVUSN-6877-1 No score

libreoffice vulnerability

It was discovered that LibreOffice incorrectly performed TLS certificate verification when the LibreOfficeKit library is being used by third-party components. A remote attacker could possibly use this issue to obtain sensitive information.

Record
USN-6877-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
libreoffice-headless
Alpaquita:23
 7.6.3.2-r3 up to 7.6.7.2-r1
7.6.7.2-r1
libreoffice-headless
Alpaquita:stream
 7.6.4.1-r1 up to 24.8.4.2-r1
24.8.4.2-r1
libreoffice
Debian:13
 before 4:24.2.4-1
4:24.2.4-1
libreoffice
Debian:14
 before 4:24.2.4-1
4:24.2.4-1
libreoffice
Mageia:9
 before 7.6.7.2-1.1.mga9
7.6.7.2-1.1.mga9
libreoffice
SUSE:Linux Enterprise Software Development Kit 12 SP5
 before 24.8.1.2-48.64.2
24.8.1.2-48.64.2
libreoffice
SUSE:Linux Enterprise Workstation Extension 12 SP5
 before 24.8.1.2-48.64.2
24.8.1.2-48.64.2
libreoffice
SUSE:Linux Enterprise Module for Package Hub 15 SP5
 before 24.8.1.2-150500.20.11.2
24.8.1.2-150500.20.11.2
libreoffice
SUSE:Linux Enterprise Module for Package Hub 15 SP6
 before 24.8.1.2-150500.20.11.2
24.8.1.2-150500.20.11.2
libreoffice
SUSE:Linux Enterprise Workstation Extension 15 SP5
 before 24.8.1.2-150500.20.11.2
24.8.1.2-150500.20.11.2
Show 5 moreShow less
Affected packages
PackageAffectedFixed
libreoffice
SUSE:Linux Enterprise Workstation Extension 15 SP6
 before 24.8.1.2-150500.20.11.2
24.8.1.2-150500.20.11.2
libreoffice
openSUSE:Leap 15.5
 before 24.8.1.2-150500.20.11.2
24.8.1.2-150500.20.11.2
libreoffice
openSUSE:Leap 15.6
 before 24.8.1.2-150500.20.11.2
24.8.1.2-150500.20.11.2
libreoffice
Ubuntu:24.04:LTS
 before 4:24.2.4-0ubuntu0.24.04.2, plus listed versions
4:7.6.2-0ubuntu14:7.6.3~rc1-0ubuntu24:7.6.3-0ubuntu34:7.6.4-0ubuntu14:7.6.4-0ubuntu3
Show 8 moreShow less
4:24.2.0~rc1-0ubuntu14:24.2.1~rc1-0ubuntu14:24.2.1~rc2-0ubuntu14:24.2.2~rc2-0ubuntu14:24.2.2-0ubuntu14:24.2.3-0ubuntu0.24.04.14:24.2.3-0ubuntu0.24.04.24:24.2.4-0ubuntu0.24.04.1
4:24.2.4-0ubuntu0.24.04.2
libreoffice
openSUSE:Tumbleweed
 before 24.2.5.2-1.1
24.2.5.2-1.1

History

History
RecordedChangedSources
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2024-5261 is a critical vulnerability (CVSS 10.0) in Libreoffice, published June 25, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.43%, the 37th percentile. Fixed in libreoffice-headless 7.6.7.2-r1.

References

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