Is CVE-2026-34757 actively exploited?

No active exploitation of CVE-2026-34757 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-34757 be exploited remotely?

No. CVE-2026-34757 requires local access to exploit.

What is the CVSS score of CVE-2026-34757?

CVE-2026-34757 has a CVSS score of 5.1 (MEDIUM).

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MEDIUM

CVE-2026-34757

CWE-416Published: April 9, 2026· Updated: Apr 13, 2026

5.1

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.7th

Official Description

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From 1.0.9 to before 1.6.57, passing a pointer obtained from png_get_PLTE, png_get_tRNS, or png_get_hIST back into the corresponding setter on the same png_struct/png_info pair causes the setter to read from freed memory and copy its contents into the replacement buffer. The setter frees the internal buffer before copying from the caller-supplied pointer, which now dangles. The freed region may contain stale data (producing silently corrupted chunk metadata) or data from subsequent heap allocations (leaking unrelated heap contents into the chunk struct). This vulnerability is fixed in 1.6.57.

NVD Source

Technical Analysis

CVE-2026-34757 requires local access, meaning attackers must already have a foothold on the target system.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.