CVE-2026-63279: CWE-125 Out-of-bounds Read in The Document Foundation LibreOffice
LibreOffice can import PICT images, which may be embedded in documents. An out of bounds read existed when importing an image that uses a colour palette. The palette index held in the image data was used without being checked against the number of entries the palette has, so an index past the last entry read memory outside the palette. In fixed versions the palette index is limited to the entries present.
AI Analysis
Technical Summary
LibreOffice 26.2 contains a CWE-125 out-of-bounds read vulnerability when importing PICT images that use a color palette. The vulnerability arises because the palette index from the image data is used without validation against the palette size, allowing reads past the last palette entry. This can result in reading unintended memory areas. The fix involves validating the palette index to ensure it does not exceed the number of palette entries.
Potential Impact
An attacker could craft a malicious PICT image with an invalid palette index to trigger an out-of-bounds read in LibreOffice 26.2. This may lead to memory disclosure or application crashes. The CVSS 4.0 base score is 5.4 (medium severity), reflecting local attack vector, low complexity, no privileges required, user interaction needed, and high impact on availability.
Mitigation Recommendations
No vendor advisory or patch links are provided. Patch status is not yet confirmed — check The Document Foundation's official advisory for current remediation guidance. Users should avoid opening untrusted PICT images in affected LibreOffice versions until a fix is confirmed.
CVE-2026-63279: CWE-125 Out-of-bounds Read in The Document Foundation LibreOffice
Description
LibreOffice can import PICT images, which may be embedded in documents. An out of bounds read existed when importing an image that uses a colour palette. The palette index held in the image data was used without being checked against the number of entries the palette has, so an index past the last entry read memory outside the palette. In fixed versions the palette index is limited to the entries present.
CVSS v4.0
Score 5.4medium
Affected software
The Document Foundation
LibreOffice
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
LibreOffice 26.2 contains a CWE-125 out-of-bounds read vulnerability when importing PICT images that use a color palette. The vulnerability arises because the palette index from the image data is used without validation against the palette size, allowing reads past the last palette entry. This can result in reading unintended memory areas. The fix involves validating the palette index to ensure it does not exceed the number of palette entries.
Potential Impact
An attacker could craft a malicious PICT image with an invalid palette index to trigger an out-of-bounds read in LibreOffice 26.2. This may lead to memory disclosure or application crashes. The CVSS 4.0 base score is 5.4 (medium severity), reflecting local attack vector, low complexity, no privileges required, user interaction needed, and high impact on availability.
Mitigation Recommendations
No vendor advisory or patch links are provided. Patch status is not yet confirmed — check The Document Foundation's official advisory for current remediation guidance. Users should avoid opening untrusted PICT images in affected LibreOffice versions until a fix is confirmed.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Document Fdn.
- Date Reserved
- 2026-07-16T08:17:05.512Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ab2677df7a7c541061982dd
Added to database: 09/22/2026, 11:33:17 UTC
Last enriched: 09/22/2026, 11:47:55 UTC
Last updated: 09/22/2026, 13:52:37 UTC
Views: 6
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