GHSA-w54j-7wpm-crhj CVE-2026-56374
ImageMagick has a heap-buffer-overflow in FTXT encoder
Medium
NuGet
- Severity
- 4.8 / 10
- Medium · CVSS 4.0
- Exploit chance (EPSS)
- 0.22%
- Chance of exploitation in the next 30 days. Higher than 12.98% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-125 Out-of-bounds Read
- Fix
- Available
- 18 packages have a fixed version
Description
The FTXT encoder lacks a boundary check when parsing ftxt:format, resulting in an out of bounds read.
==3040863==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x5020000085b2 at pc 0x606c1ee0c6ce bp 0x7ffee30d6150 sp 0x7ffee30d6148
READ of size 1 at 0x5020000085b2 thread T0
Affected versions
NuGet
| Package | Vulnerable | Fixed in |
|---|---|---|
| Magick.NET-Q16-AnyCPU | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-HDRI-AnyCPU | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-HDRI-OpenMP-arm64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-HDRI-OpenMP-x64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-HDRI-arm64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-HDRI-x64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-HDRI-x86 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-OpenMP-arm64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-OpenMP-x64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-arm64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-x64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q16-x86 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q8-AnyCPU | < 14.12.0 |
14.12.0 |
| Magick.NET-Q8-OpenMP-arm64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q8-OpenMP-x64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q8-arm64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q8-x64 | < 14.12.0 |
14.12.0 |
| Magick.NET-Q8-x86 | < 14.12.0 |
14.12.0 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
Magick.NET-Q16-AnyCPU NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-AnyCPU --version 14.12.0
Magick.NET-Q16-HDRI-AnyCPU NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.12.0
Magick.NET-Q16-HDRI-OpenMP-arm64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-HDRI-OpenMP-arm64 --version 14.12.0
Magick.NET-Q16-HDRI-OpenMP-x64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-HDRI-OpenMP-x64 --version 14.12.0
Magick.NET-Q16-HDRI-arm64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-HDRI-arm64 --version 14.12.0
Magick.NET-Q16-HDRI-x64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-HDRI-x64 --version 14.12.0
Magick.NET-Q16-HDRI-x86 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-HDRI-x86 --version 14.12.0
Magick.NET-Q16-OpenMP-arm64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-OpenMP-arm64 --version 14.12.0
Magick.NET-Q16-OpenMP-x64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-OpenMP-x64 --version 14.12.0
Magick.NET-Q16-arm64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-arm64 --version 14.12.0
Magick.NET-Q16-x64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-x64 --version 14.12.0
Magick.NET-Q16-x86 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q16-x86 --version 14.12.0
Magick.NET-Q8-AnyCPU NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q8-AnyCPU --version 14.12.0
Magick.NET-Q8-OpenMP-arm64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q8-OpenMP-arm64 --version 14.12.0
Magick.NET-Q8-OpenMP-x64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q8-OpenMP-x64 --version 14.12.0
Magick.NET-Q8-arm64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q8-arm64 --version 14.12.0
Magick.NET-Q8-x64 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q8-x64 --version 14.12.0
Magick.NET-Q8-x86 NuGet → 14.12.0
- dotnet
dotnet add package Magick.NET-Q8-x86 --version 14.12.0
Severity breakdown
CVSS 4.0 4.8
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/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
- Attack vector
- Local
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- None
- User interaction
- Passive
- Confidentiality (vulnerable system)
- None
- Integrity (vulnerable system)
- None
- Availability (vulnerable system)
- Low
- Confidentiality (subsequent systems)
- None
- Integrity (subsequent systems)
- None
- Availability (subsequent systems)
- None
- Exploit maturity
- Not defined
- Scope
- X
CVSS 3.1 3.3
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
Weakness
CWE-125: Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
How to prevent it
- Implementation: Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does. When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue." Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright. To reduce the likelihood of introducing an out-of-bounds read, ensure that you validate and ensure correct calculations for any length argument, buffer size calculation, or offset. Be especially careful of relying on a sentinel (i.e. special character such as NUL) in untrusted inputs.
- Architecture and Design: Use a language that provides appropriate memory abstractions.
References
Advisories
Packages
Other links
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-j7hp-h8jx-5ppr libwebp: OOB write in BuildHuffmanTable | High Known exploited | Also affects magick.net-q16-anycpu |
| GHSA-cvhv-g4rq-3hmw ImageMagick: Memory Leak when providing invalid options to the cli | Medium | Also affects Magick.NET-Q16-AnyCPU |
| GHSA-h22j-f9xw-xjjm ImageMagick: Integer Overflow in JNX decoder causes heap buffer over-write when processing extremly large files on 32-bit builds | Medium | Also affects Magick.NET-Q16-AnyCPU |
| GHSA-422r-8c97-xcg4 ImageMagick: Heap Buffer Over-Write in fx operation | Medium | Also affects Magick.NET-Q16-AnyCPU |
| GHSA-f5m7-cqgw-8hm7 ImageMagick: Heap Buffer Over-Write in morphology operation when an invalid kernel is provided | Medium | Also affects Magick.NET-Q16-AnyCPU |
| GHSA-hc76-7mpc-qjqh ImageMagick: Code injection in HTML encoder due to incomplete fix of CVE-2026-25797 | Medium | Also affects Magick.NET-Q16-AnyCPU |
| GHSA-56m6-8q75-f2rw ImageMagick: Policy Bypass due to an incomplete fix of CVE-2026-49219 | Medium | Also affects Magick.NET-Q16-AnyCPU |
| GHSA-h5r4-w88w-7ccr ImageMagick: Memory Leak in TIFF encoder when invalid tiff:tile-geometry is specified | Low | Also affects Magick.NET-Q16-AnyCPU |
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