SixLabors ImageSharp Allows Excessive Memory Allocation in Gif Decoder
Priority MEDIUM 40CWE-789Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-789.
Summary
ImageSharp is a 2D graphics API. A vulnerability discovered in the ImageSharp library, where the processing of specially crafted files can lead to excessive memory usage in the Gif decoder. The vulnerability is triggered when ImageSharp attempts to process image files that are designed to exploit this flaw. All users are advised to upgrade to v3.1.5 or v2.1.9.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00774 55th percentileScored 2026-11-07
Fix Fixed ImageSharp (SixLabors): 2.1.9, 3.1.5SixLabors.ImageSharp (NuGet): 2.1.9, 3.1.5
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| SixLabors | ImageSharp | before 2.1.9; 3.0.0 to before 3.1.5 | 2.1.9, 3.1.5 | Patch available | CNA |
| — | SixLabors.ImageSharp (NuGet) | before 2.1.9 | 2.1.9 | Patch available | GHSA-qxrv-gp6x-rc23 |
| — | SixLabors.ImageSharp (NuGet) | 3.0.0 to before 3.1.5 | 3.1.5 | Patch available | GHSA-qxrv-gp6x-rc23 |
- ImageSharp VendorSixLabors Affected before 2.1.9; 3.0.0 to before 3.1.5 Fixed in 2.1.9, 3.1.5 Patch available CNA
- SixLabors.ImageSharp (NuGet) Vendor— Affected before 2.1.9 Fixed in 2.1.9 Patch available GHSA-qxrv-gp6x-rc23
- SixLabors.ImageSharp (NuGet) Vendor— Affected 3.0.0 to before 3.1.5 Fixed in 3.1.5 Patch available GHSA-qxrv-gp6x-rc23
Remediation
- Fix · CNA ImageSharp (SixLabors) Fixed in 2.1.9, 3.1.5
- Fix · GHSA-qxrv-gp6x-rc23 SixLabors.ImageSharp (NuGet) Fixed in 2.1.9 Advisory →
- Fix · GHSA-qxrv-gp6x-rc23 SixLabors.ImageSharp (NuGet) Fixed in 3.1.5 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2024-41132
- 2026-10-03 Alias added: GHSA-qxrv-gp6x-rc23
References
Patch 3
Advisory 2
Other 6
- https://github.com/SixLabors/ImageSharp/pull/2759
- https://github.com/SixLabors/ImageSharp/pull/2764
- https://github.com/SixLabors/ImageSharp/pull/2770
- https://docs.sixlabors.com/articles/imagesharp.web/processingcommands.html#securing-processing-commands
- https://docs.sixlabors.com/articles/imagesharp/security.html
- https://github.com/SixLabors/ImageSharp
More SixLabors Imagesharp vulnerabilities
- TI-2026-68636 Out-of-bounds write in ImageSharp CCITT fax decompression CVSS 3.1HIGH 7.5
- TI-2026-68634 Out-of-bounds write in ImageSharp TIFF CCITT Group 4 encoder CVSS 3.1HIGH 7.5
- TI-2026-68629 Out-of-bounds write in ImageSharp TIFF CCITT encoder CVSS 3.1HIGH 7.5
- TI-2025-20408 Out-of-bounds Write in SixLabors ImageSharp CVSS 3.1HIGH 7.5
- TI-2026-68635 ImageSharp BigTIFF IFD count can keep a decoder thread in a non-progressing loop CVSS 3.1MEDIUM 5.3
- TI-2026-68633 Excessive memory allocation in ImageSharp ICC CLUT parsing CVSS 3.1MEDIUM 5.3
Sources
- CVE-2024-41132 · CVE Program
- CVE-2024-41132 · NVD
- FIRST EPSS
- GHSA-qxrv-gp6x-rc23 · GitHub Advisory Database · CC BY 4.0
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