OSV-2026-599 UNKNOWN READ in XRef::parseEntry

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=504271260 Crash type: UNKNOWN READ Crash state: XRef::parseEntry XRef::getEntry Parser::makeStream...

DNG File Fuzzer for Robustness

This Python script is a mutation-based fuzzing tool designed to test the robustness of DNG Digital Negative / TIFF-based file parsers by generating large numbers of corrupted or semi-valid image files. It works by starting from a minimal valid DNG structure, then applying random mutations to...

OSV-2026-595 UNKNOWN WRITE in std::__1::istreambuf_iterator<char, std::__1::char_traits<char>> std::__1::num_g

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=504141064 Crash type: UNKNOWN WRITE Crash state: std::1::istreambufiterator std::1::numg std::1::basicistream& std::1::inputar igl::MshLoader::parseelementfield...

SDLLMFuzz: Dynamic-Static LLM-Assisted Greybox Fuzzing for Structured Input Programs

Fuzzing has become a widely adopted technique for vulnerability discovery, yet it remains ineffective for structured-input programs due to strict syntactic constraints and limited semantic awareness. Traditional greybox fuzzers rely on mutation-based strategies and coarse-grained coverage feedbac...

catbyte-toolkit

cb - Binary Analysis Toolkit for macOS/iOS Security Research...

TEMPLATEFUZZ: Fine-Grained Chat Template Fuzzing for Jailbreaking and Red Teaming LLMs

Large Language Models LLMs are increasingly deployed across diverse domains, yet their vulnerability to jailbreak attacks, where adversarial inputs bypass safety mechanisms to elicit harmful outputs, poses significant security risks. While prior work has primarily focused on prompt injection...

OpenEXR Makes Use of Uninitialized Memory

Summary While fuzzing openexrexrcheckfuzzer, Valgrind reports a conditional branch depending on uninitialized data inside genericunpack. This indicates a use of uninitialized memory CWE-457. The issue is reproducible with the current OSS-Fuzz harness and a single-file PoC. Details Environment: -...

GHSA-3H9H-QFVW-98HQ OpenEXR Makes Use of Uninitialized Memory

Summary While fuzzing openexrexrcheckfuzzer, Valgrind reports a conditional branch depending on uninitialized data inside genericunpack. This indicates a use of uninitialized memory CWE-457. The issue is reproducible with the current OSS-Fuzz harness and a single-file PoC. Details Environment: -...

OSV-2026-534 Heap-buffer-overflow in cram_encode_container

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=499447432 Crash type: Heap-buffer-overflow READ 1 Crash state: cramencodecontainer cramflushcontainermt cramclose...

Triggering and Detecting Exploitable Library Vulnerability from the Client by Directed Greybox Fuzzing

Developers utilize third-party libraries to improve productivity, which also introduces potential security risks. Existing approaches generate tests for public functions to trigger library vulnerabilities from client programs, yet they depend on proof-of-concepts PoCs, which are often unavailable...

OSV-2026-518 Use-of-uninitialized-value in ne_read_block

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=498498500 Crash type: Use-of-uninitialized-value Crash state: nereadblock nesteggreadpacket fuzz.cc...

Enhancing REST API Fuzzing with Access Policy Violation Checks and Injection Attacks

Due to their widespread use in industry, several techniques have been proposed in the literature to fuzz REST APIs. Existing fuzzers for REST APIs have been focusing on detecting crashes e.g., 500 HTTP server error status code. However, security vulnerabilities can have major drastic consequences...

penclaw

🦀 PenClaw AI-powered penetration testing CLI. One command...

OSV-2026-455 UNKNOWN READ in mkv::matroska_segment_c::TrackInit

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=495498906 Crash type: UNKNOWN READ Crash state: mkv::matroskasegmentc::TrackInit mkv::matroskasegmentc::TrackInit mkv::matroskasegmentc::ParseTrackEntry...

XSStrike 3.1.6

XSStrike is a cross site scripting detection suite equipped with four hand written parsers, an intelligent payload generator, a powerful fuzzing engine and an incredibly fast crawler. Instead of injecting payloads and checking it works like all the other tools do, XSStrike analyses the response...

Not All Tokens Are Created Equal: Query-Efficient Jailbreak Fuzzing for LLMs

Large Language ModelsLLMs are widely deployed, yet are vulnerable to jailbreak prompts that elicit policy-violating outputs. Although prior studies have uncovered these risks, they typically treat all tokens as equally important during prompt mutation, overlooking the varying contributions of...

Auditing MCP Servers for Over-Privileged Tool Capabilities

The Model Context Protocol MCP has emerged as a standard for connecting Large Language Models LLMs to external tools and data. However, MCP servers often expose privileged capabilities, such as file system access, network requests, and command execution that can be exploited if not properly...

Weaver: Fuzzing JavaScript Engines at the JavaScript-WebAssembly Boundary

The security of modern JavaScript JS engines is critical since they provide the primary defense mechanism for executing untrusted code on the web. The recent integration of WebAssembly Wasm has transformed these engines into complex polyglot environments, creating a novel attack surface at the...

CVE-2026-23265

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on node footer in read,writeendio ----------- cut here ------------ kernel BUG at fs/f2fs/data.c:358! Call Trace: blkupdaterequest+0x5eb/0xe70 block/blk-mq.c:987 blkmqendrequest+0x3e/0x70...

Hunting CUDA Bugs at Scale with cuFuzz

GPUs play an increasingly important role in modern software. However, the heterogeneous host-device execution model and expanding software stacks make GPU programs prone to memory-safety and concurrency bugs that evade static analysis. While fuzz-testing, combined with dynamic error checking tool...