EUVD-2026-23646Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
6DescriptionGitHub Advisory
SAIL is a cross-platform library for loading and saving images with support for animation, metadata, and ICC profiles. Prior to commit c930284445ea3ff94451ccd7a57c999eca3bc979, the PSD codec computes bytes-per-pixel (bpp) from raw header fields channels * depth, but the pixel buffer is allocated based on the resolved pixel format. For LAB mode with channels=3, depth=16, bpp = (3*16+7)/8 = 6, but the format BPP40_CIE_LAB allocates only 5 bytes per pixel. Every pixel write overshoots, causing a deterministic heap buffer overflow on every row. Commit c930284445ea3ff94451ccd7a57c999eca3bc979 contains a patch.
AnalysisAI
Heap buffer overflow in SAIL PSD codec allows remote code execution when processing malicious LAB-mode PSD files. Affects all SAIL versions prior to commit c930284 (HappySeaFox/sail). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires target application to use SAIL library for image processing AND process untrusted PSD files via SAIL's PSD codec. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 9.8 (Critical) reflects maximum exploitability: network-accessible attack vector, low complexity, no authentication or user interaction required, and complete compromise of confidentiality, integrity, and availability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Attacker crafts a malicious PSD file with LAB colorspace (colormode=9), 3 channels, and 16-bit depth. When a victim application using SAIL processes this file (e.g., web service generating thumbnails from user uploads, document converter, image gallery software), the PSD decoder allocates a 5-byte-per-pixel buffer but writes 6 bytes per pixel. … |
| Remediation | Update SAIL to commit c930284445ea3ff94451ccd7a57c999eca3bc979 or later, available at https://github.com/HappySeaFox/sail/commit/c930284445ea3ff94451ccd7a57c999eca3bc979. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all systems and applications using SAIL library and document current versions; restrict PSD file uploads or processing from untrusted sources. …
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External POC / Exploit Code
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