A vulnerability has been found in FastStone Image Viewer up to 8.3. (CVE-2026-101203)
A vulnerability has been found in FastStone Image Viewer up to 8.3. The impacted element is an unknown function of the component 1bpp RLE Decoder. The manipulation leads to out-of-bounds write. The attack can be initiated remotely. The vendor was contacted early about this disclosure but did not respond in any way.
AI Analysis
Technical Summary
CVE-2026-101203 describes an out-of-bounds write vulnerability in an unknown function within the 1bpp RLE Decoder component of FastStone Image Viewer versions up to 8.3. The vulnerability can be triggered remotely and may result in limited confidentiality, integrity, and availability impacts. The vendor was contacted but did not provide any response or patch information.
Potential Impact
Successful exploitation can lead to out-of-bounds memory writes, which may cause partial confidentiality, integrity, and availability impacts. The CVSS 3.1 score is 6.3, indicating a medium severity level with network attack vector, low attack complexity, no privileges required, and user interaction required.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor has not responded and no patch information is available, users should exercise caution when opening untrusted files and monitor for updates from the vendor.
A vulnerability has been found in FastStone Image Viewer up to 8.3. (CVE-2026-101203)
Description
A vulnerability has been found in FastStone Image Viewer up to 8.3. The impacted element is an unknown function of the component 1bpp RLE Decoder. The manipulation leads to out-of-bounds write. The attack can be initiated remotely. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS v3.1
Score 6.3medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-101203 describes an out-of-bounds write vulnerability in an unknown function within the 1bpp RLE Decoder component of FastStone Image Viewer versions up to 8.3. The vulnerability can be triggered remotely and may result in limited confidentiality, integrity, and availability impacts. The vendor was contacted but did not provide any response or patch information.
Potential Impact
Successful exploitation can lead to out-of-bounds memory writes, which may cause partial confidentiality, integrity, and availability impacts. The CVSS 3.1 score is 6.3, indicating a medium severity level with network attack vector, low attack complexity, no privileges required, and user interaction required.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor has not responded and no patch information is available, users should exercise caution when opening untrusted files and monitor for updates from the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-r4jh-4qvm-8mh5
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-101203"]
- Database Specific Severity
- LOW
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abb4180f7a7c54106cc2eb3
Added to database: 09/29/2026, 04:41:36 UTC
Last enriched: 09/29/2026, 04:45:09 UTC
Last updated: 09/29/2026, 18:20:27 UTC
Views: 4
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