What is CVE-2026-5342?

CVE-2026-5342 is a medium-severity vulnerability in Libraw, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-04-02.

How severe is CVE-2026-5342?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Buffer overflow in Libraw

CVE-2026-5342

A flaw has been found in LibRaw up to 0.22.0. This affects the function LibRaw::nikon_load_padded_packed_raw of the file src/decoders/decoders_libraw.cpp of the component TIFF/NEF. Executing a manipulation of the argument load_flags/raw_width can lead to out-of-bounds read. It is possible to launch the attack remotely. The exploit has been published and may be used. Upgrading to version 0.22.1 mitigates this issue. This patch is called b8397cd45657b84e88bd1202528d1764265f185c. It is advisable to upgrade the affected component.

Vulnerability class: Buffer Overflow

Published 2026-04-02 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.010 (60.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.010 · change: +0.002

Affected products

Libraw
Libraw — versions 0.1, 0.2, 0.3

Weakness classification (CWE)

References

vuldb.com/vuln/354671 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
vuldb.com/vuln/354671/cti (signature, Permissions Required, permissions-required, VDB Entry)
vuldb.com/submit/781223 (Exploit, VDB Entry, Third Party Advisory, third-party-advisory)
github.com/LibRaw/LibRaw/issues/795 (issue-tracking, Issue Tracking)
github.com/LibRaw/LibRaw/issues/795 (issue-tracking, Issue Tracking)
github.com/biniamf/pocs/tree/main/libraw_nikonpadded (Exploit, Third Party Advisory, exploit)
github.com/LibRaw/LibRaw/commit/b8397cd45657b84e88bd1202528d1764265f185c (Patch, patch)
github.com/LibRaw/LibRaw/releases/tag/0.22.1 (Product, Release Notes, patch)
github.com/LibRaw/LibRaw/ (Product, product)

Frequently asked questions

What is CVE-2026-5342?: CVE-2026-5342 is a medium-severity vulnerability in Libraw, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-04-02.
How severe is CVE-2026-5342?: Medium severity. CVSS v3 base score is 5.3 out of 10.