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The vulnerability is an improper verification of cryptographic signature in the SeekableOutputStream.Java file within the batik-codec-fix module of the quick-media library. This flaw occurs during PNG image decoding, where the codec fails to validate cryptographic signatures in PNG data streams. Without proper verification, maliciously crafted PNG files can contain data that exceeds the allocated buffer size, leading to a buffer overflow. The overflow corrupts adjacent memory, which can result in arbitrary code execution or denial of service. The issue affects all versions up to and including 3.0.0, specifically in the plugins/svg-plugin/batik-codec-fix/src/main/java/org/apache/batik/ext/awt/image/codec/util modules. Attackers exploit this by supplying PNG images with manipulated signatures that trigger the overflow during processing. The root cause is the lack of bounds checking in the signature verification logic. The patch in commit 3970e96 addresses this by implementing proper signature validation and buffer size checks.
Platform: quick-media
Version: <= 3.0.0
Vulnerability: Buffer Overflow PNG
Severity: Moderate
Date: Jan 27 2026
Prediction: Patch Jan 28 2026
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git clone https://github.com/liuyueyi/quick-media.git
cd quick-media
git checkout 3970e96
grep -r “SeekableOutputStream” src/
mvn dependency:tree | grep quick-media
java -version
code snippet from SeekableOutputStream.java:
// Vulnerable signature verification logic
// Buffer overflow possible here
how Exploit:
Craft malicious PNG
Trigger buffer overflow
Execute arbitrary code
Protection from this CVE
Apply patch 3970e96
Upgrade quick-media
Validate PNG signatures
Impact:
Arbitrary code execution
Denial of service
System compromise
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Sources:
Reported By: github.com
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