CVE-2026-47927: DNG SDK Information Disclosure Flaw

CVE-2026-47927 Overview

CVE-2026-47927 is an out-of-bounds read vulnerability affecting Adobe Digital Negative (DNG) Software Development Kit versions 1.7.1 build 2536 and earlier. The flaw allows an attacker to read memory outside the bounds of an allocated buffer, potentially disclosing sensitive process memory contents. Exploitation requires user interaction, as a victim must open a crafted DNG file processed by an application using the vulnerable SDK. The weakness is categorized under [CWE-125] (Out-of-bounds Read).

Critical Impact
Successful exploitation discloses sensitive memory contents from the host process, which may include data used by other operations performed by the affected application.

Affected Products

Adobe DNG SDK version 1.7.1.2536
Adobe DNG SDK versions earlier than 1.7.1.2536
Applications and image processing pipelines that embed the affected DNG SDK

Discovery Timeline

2026-06-16 - CVE-2026-47927 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2026-47927

Vulnerability Analysis

The DNG SDK parses Digital Negative raw image files, a TIFF-based container format used for camera raw data. The vulnerability resides in the SDK's file parsing routines, where insufficient bounds checking allows read operations to extend past the end of an allocated buffer. When a malicious DNG file is opened by an application linked against the affected SDK, the parser dereferences memory outside the intended buffer region.

The attack vector is local and requires user interaction. The confidentiality impact is rated high, while integrity and availability are not affected, consistent with a pure information disclosure primitive. Disclosed memory could include pointer values useful for bypassing address space layout randomization (ASLR) or sensitive data from prior allocations in the host process.

Root Cause

The root cause is improper validation of length, offset, or index fields in attacker-controlled DNG file structures. Parsers that trust file-supplied size or offset values without verifying them against actual buffer boundaries can read beyond the allocated region. Adobe has not published low-level technical details in the public advisory.

Attack Vector

An attacker crafts a malicious DNG file with manipulated metadata or image data structures designed to trigger the out-of-bounds read. The file must be delivered to the victim through email, web download, removable media, or another file delivery channel. When the victim opens the file in an application that uses the vulnerable DNG SDK, the parsing routine reads memory beyond the intended buffer and returns the contents through the application's processing pipeline.

The vulnerability mechanism is described in prose only — no verified proof-of-concept code is publicly available. See the Adobe Security Advisory APSB26-67 for vendor-provided details.

Detection Methods for CVE-2026-47927

Indicators of Compromise

DNG files originating from untrusted senders or unexpected sources opened by users on workstations running Adobe creative applications or third-party software that embeds the DNG SDK
Crash reports or unexpected exceptions in processes that load dng_sdk components after opening a raw image file
Outbound network activity from image-processing applications immediately after a DNG file is opened, suggesting exfiltration of leaked memory contents

Detection Strategies

Inspect DNG file structure with format validators to flag malformed metadata, oversized offset fields, or inconsistent length descriptors before files reach end users
Monitor process telemetry for image-processing applications that exhibit abnormal memory read patterns, unexpected child processes, or crashes correlated with DNG file opens
Hunt for delivery patterns where DNG attachments arrive via phishing emails or are downloaded from low-reputation domains

Monitoring Recommendations

Log file open events for .dng extensions across endpoints, correlating with the application performing the read
Alert on application crash signatures involving DNG parsing modules and forward dumps for analysis
Track software inventory for applications bundling the DNG SDK to scope exposure across the environment

How to Mitigate CVE-2026-47927

Immediate Actions Required

Inventory all applications and internal tools that bundle or link against the Adobe DNG SDK and identify versions in use
Update the DNG SDK to a fixed release published by Adobe as soon as it is available through the vendor channel
Restrict opening of DNG files from untrusted sources until affected components are patched

Patch Information

Adobe addresses this vulnerability in the security update referenced in Adobe Security Advisory APSB26-67. Organizations distributing software that statically links the DNG SDK must rebuild their products against the patched SDK version and ship updates to downstream users.

Workarounds

Block or quarantine .dng file attachments at the email gateway when business workflows permit
Use application allowlisting to prevent unapproved image-processing tools from handling raw camera files
Educate users to avoid opening DNG files received from unknown or unverified senders until patches are deployed

bash

# Configuration example
# Identify processes loading DNG SDK libraries on Linux/macOS hosts
lsof 2>/dev/null | grep -i 'dng_sdk\|libdng'

# Block .dng attachments at a Postfix gateway (header_checks)
# /etc/postfix/header_checks
/^Content-(Disposition|Type).*name\s*=\s*"?[^"]+\.dng"?/ REJECT DNG attachments blocked pending CVE-2026-47927 remediation