EUVD-2026-40269

brace-expansion: DoS via exponential-time expansion of consecutive non-expanding groups...

GHSA-C98P-7WGM-6P64 Tornado: Quadratic DoS via Repeated Header Coalescing

Summary The HTTPHeaders.add method in Tornado accumulates values using string concatenation when the same header name is repeated. Due to Python string immutability, each concatenation copies the entire string, resulting in On² time complexity. Given Tornado's single event loop architecture, a...

Tornado: Quadratic DoS via Repeated Header Coalescing

Summary The HTTPHeaders.add method in Tornado accumulates values using string concatenation when the same header name is repeated. Due to Python string immutability, each concatenation copies the entire string, resulting in On² time complexity. Given Tornado's single event loop architecture, a...

PYSEC-2026-2484 FastChat has Denial of Service Through Blocking Event Loop in Model Workers (Incomplete Fix for ff66426)

A security vulnerability has been detected in lm-sys fastchat up to 0.2.36. This issue affects the function apigenerate of the component Worker API Endpoint. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed publicly and may be...

GHSA-CWC9-CP4J-MCVV libp2p: CPU DoS via oversized IHAVE and IWANT control message arrays

Summary gossipsub processes IHAVE and IWANT control messages by iterating every received message ID synchronously before doing anything with the results. There is no cap on how many IDs a single frame may contain. The default LP frame limit is 4MB, which fits roughly 180,000 message IDs. Iteratin...

EUVD-2026-42409

libp2p: CPU DoS via oversized IHAVE and IWANT control message arrays...

CVE-2026-59220

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.2 before 0.10.0, the SKILLMENTIONRE and stripre regular expressions in backend/openwebui/utils/middleware.py parsed skill mentions with overlapping quantifiers, allowing an authenticated chat message...

PT-2026-56829

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.9.2 through 0.9.x Description An issue exists in the SKILL MENTION RE and strip re regular expressions within the backend/open webui/utils/middleware.py file. These expressions parse skill mentions in the format using...

CVE-2026-57480

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.9.1-alpha.12 and 8.6.82, deeply nested $or, $and, and $nor query condition operators in the REST API or LiveQuery query handling could trigger exponential-time processing in the...

CVE-2026-49866

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to 16.0.0, @libp2p/gossipsub defaultDecodeRpcLimits set maxIhaveMessageIDs and maxIwantMessageIDs to Infinity, allowing oversized IHAVE and IWANT control message arrays in message/decodeRpc.ts and gossipsub.ts to synchronousl...

CVE-2026-57480

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.9.1-alpha.12 and 8.6.82, deeply nested $or, $and, and $nor query condition operators in the REST API or LiveQuery query handling could trigger exponential-time processing in the...

CVE-2026-49866

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to 16.0.0, @libp2p/gossipsub defaultDecodeRpcLimits set maxIhaveMessageIDs and maxIwantMessageIDs to Infinity, allowing oversized IHAVE and IWANT control message arrays in message/decodeRpc.ts and gossipsub.ts to synchronousl...

CVE-2026-49866

CVE-2026-49866 affects the JavaScript libp2p implementation, specifically the @libp2p/gossipsub component. The root cause is defaultDecodeRpcLimits allowing maxIhaveMessageIDs and maxIwantMessageIDs to be Infinity prior to v16.0.0, enabling oversized IHAVE/IWANT control message arrays in message/...

PT-2026-56603

Name of the Vulnerable Software and Affected Versions libp2p versions prior to 16.0.0 Description In the @libp2p/gossipsub module, the defaultDecodeRpcLimits configuration sets maxIhaveMessageIDs and maxIwantMessageIDs to Infinity. This allows oversized IHAVE and IWANT control message arrays in...

PYSEC-2026-1975 Tornado has an HTTP cookie parsing DoS vulnerability

The algorithm used for parsing HTTP cookies in Tornado versions prior to 6.4.2 sometimes has quadratic complexity, leading to excessive CPU consumption when parsing maliciously-crafted cookie headers. This parsing occurs in the event loop thread and may block the processing of other requests. See...

BIT-LIBPYTHON-2026-3298 Out-of-bounds write in Windows asyncio.ProacterEventLoop.sock_recvfrom_into() when using nbytes

The method "sockrecvfrominto" of "asyncio.ProacterEventLoop" Windows only was missing a boundary check for the data buffer when using nbytes parameter. This allowed for an out-of-bounds buffer write if data was larger than the buffer size. Non-Windows platforms are not affected...

CVE-2026-58578

LobeChat before version 2.2.10-canary.15 contains a regular expression denial of service ReDoS vulnerability that allows authenticated attackers to block the Node.js event loop by supplying a catastrophic-backtracking pattern in a GitHub repository URL path during skill import. Attackers can craf...

CVE-2026-58578 LobeChat < 2.2.10-canary.15 - Regular Expression Denial of Service in GitHub Skill Import

LobeChat before version 2.2.10-canary.15 contains a regular expression denial of service ReDoS vulnerability that allows authenticated attackers to block the Node.js event loop by supplying a catastrophic-backtracking pattern in a GitHub repository URL path during skill import. Attackers can craf...

EUVD-2026-41420

LobeChat before version 2.2.10-canary.15 contains a regular expression denial of service ReDoS vulnerability that allows authenticated attackers to block the Node.js event loop by supplying a catastrophic-backtracking pattern in a GitHub repository URL path during skill import. Attackers can craf...

PT-2026-55290

Name of the Vulnerable Software and Affected Versions LobeChat versions prior to 2.2.10-canary.15 Description An authenticated attacker can cause a regular expression denial of service ReDoS by providing a catastrophic-backtracking pattern in a GitHub repository URL path during skill import. This...