CVE-2026-33636 | pnggroup libpng up to 1.6.36 out-of-bounds write

VDB-353557 · CVE-2026-33636 · GCVE-0-2026-33636 PNGGROUP LIBPNG UP TO 1.6.36 OUT-OF-BOUNDS WRITE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.0 $0-$5k 3.12+ Summaryinfo A vulnerability, which was classified as critical, has been found in pnggroup libpng up to 1.6.36. The affected element is an unknown function. This manipulation causes out-of-bounds write. This vulnerability is tracked as CVE-2026-33636. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component. Detailsinfo A vulnerability classified as critical was found in pnggroup libpng up to 1.6.36. Affected by this vulnerability is an unknown functionality. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The advisory is shared at github.com. This vulnerability is known as CVE-2026-33636. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. Upgrading to version 1.6.56 eliminates this vulnerability. Productinfo Type Image Processing Software Vendor pnggroup Name libpng Version 1.6.0 1.6.1 1.6.2 1.6.3 1.6.4 1.6.5 1.6.6 1.6.7 1.6.8 1.6.9 1.6.10 1.6.11 1.6.12 1.6.13 1.6.14 1.6.15 1.6.16 1.6.17 1.6.18 1.6.19 1.6.20 1.6.21 1.6.22 1.6.23 1.6.24 1.6.25 1.6.26 1.6.27 1.6.28 1.6.29 1.6.30 1.6.31 1.6.32 1.6.33 1.6.34 1.6.35 1.6.36 License open-source Website Product: https://github.com/pnggroup/libpng/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 6.0 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Out-of-bounds write CWE: CWE-787 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: libpng 1.6.56 Timelineinfo 03/26/2026 Advisory disclosed 03/26/2026 +0 days VulDB entry created 03/26/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-33636 (🔒) GCVE (CVE): GCVE-0-2026-33636 GCVE (VulDB): GCVE-100-353557 Entryinfo Created: 03/26/2026 07:06 Changes: 03/26/2026 07:06 (52) Complete: 🔍 Cache ID: 99:3E0:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸