CVE-2026-106116
When fewer than 20 bytes remain, ExifReader.ReadValue64 returns without advancing the stream or terminating the outer loop, so a small malformed BigTIFF can keep one decoder thread executing for an attacker-controlled duration.
Does this matter?
Lower severity and a low EPSS score (0.33%). Track it; it rarely justifies an emergency change on its own.
Description
ImageSharp is a 2D graphics library. From 2.0.0 until 4.1.2, ExifReader.ReadValues64 trusts the 64-bit BigTIFF IFD entry count and iterates once per declared entry. When fewer than 20 bytes remain, ExifReader.ReadValue64 returns without advancing the stream or terminating the outer loop, so a small malformed BigTIFF can keep one decoder thread executing for an attacker-controlled duration. This report does not claim worker-pool exhaustion. This issue is fixed in version 4.1.2.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- EPSS
- 0.33% probability · 26th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-835
- Affected
- sixlabors/imagesharp
- Source
- security-advisories@github.com
EPSS moved from 0.4% on 7 October 2026 to 0.3% on 26 October 2026.
References
- https://github.com/SixLabors/ImageSharp/commit/92b12d72550ebb6be5b1e22e559c361fd863a6ecPatch
- https://github.com/SixLabors/ImageSharp/pull/3187Issue Tracking, Patch
- https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2Release Notes
- https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-wmxv-xphr-5c9gExploit, Vendor Advisory
- https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-wmxv-xphr-5c9gExploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.