CVE-2026-44453

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 6b5370d, h2o is vulnerable to a Denial of Service attack when calling alloca under certain conditions. When serving static files, h2o builds the file path on stack, by calling alloca. The maximum size of the memor...

CVE-2026-44453 h2o is vulnerable to musl libc stack overflow

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 6b5370d, h2o is vulnerable to a Denial of Service attack when calling alloca under certain conditions. When serving static files, h2o builds the file path on stack, by calling alloca. The maximum size of the memor...

CVE-2026-44453 h2o is vulnerable to musl libc stack overflow

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 6b5370d, h2o is vulnerable to a Denial of Service attack when calling alloca under certain conditions. When serving static files, h2o builds the file path on stack, by calling alloca. The maximum size of the memor...

CVE-2026-44453

The CVE-2026-44453 entry concerns the h2o HTTP server (HTTP/1.x, HTTP/2, HTTP/3). Before commit 6b5370d, h2o could trigger a Denial of Service by calling alloca to build file paths for static files, potentially allocating up to ~600 KB on the stack. This exceeds the musl libc pthread stack defaul...

CVE-2026-44453

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 6b5370d, h2o is vulnerable to a Denial of Service attack when calling alloca under certain conditions. When serving static files, h2o builds the file path on stack, by calling alloca. The maximum size of the memor...

EUVD-2026-45074

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 6b5370d, h2o is vulnerable to a Denial of Service attack when calling alloca under certain conditions. When serving static files, h2o builds the file path on stack, by calling alloca. The maximum size of the memor...

Directory Traversal

Overview Affected versions of this package are vulnerable to Directory Traversal through PluginsGenerationService in the plugin manifest generation code. An attacker can make the generated Copilot or Teams plugin manifest reference files outside the plugin package by supplying an OpenAPI...

CVE-2026-59864

Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, kiota plugin add and kiota plugin generate with -t APIPlugin emitted attacker-controlled statictemplate.file values from x-ai-adaptive-card and x-ai-capabilities into generated Microsoft 365 Copilot and Teams plugin...

CVE-2026-55406 Buffa: Use-After-Free in OwnedView via Unsound 'static Lifetime Promotion in Deref

Buffa is a pure-Rust Protocol Buffers implementation with first-class protobuf editions support. Prior to 0.7.0, a soundness bug in the OwnedView type allowed safe Rust code to trigger a use-after-free: the OwnedView::decode constructor transmuted a borrowed slice to &'static u8, and the Deref...

CVE-2026-55406 Buffa: Use-After-Free in OwnedView via Unsound 'static Lifetime Promotion in Deref

Buffa is a pure-Rust Protocol Buffers implementation with first-class protobuf editions support. Prior to 0.7.0, a soundness bug in the OwnedView type allowed safe Rust code to trigger a use-after-free: the OwnedView::decode constructor transmuted a borrowed slice to &'static u8, and the Deref...

CVE-2026-55406

Buffa (Rust Protocol Buffers) prior to 0.7.0 contained a soundness flaw in OwnedView where OwnedView::decode transmuted a borrowed slice to &'static [u8] and the Deref promoted the static lifetime to borrowed view fields. This could let references outlive the OwnedView and, after drop, the backin...

CVE-2026-55406 Buffa: Use-After-Free in OwnedView via Unsound 'static Lifetime Promotion in Deref

Buffa is a pure-Rust Protocol Buffers implementation with first-class protobuf editions support. Prior to 0.7.0, a soundness bug in the OwnedView type allowed safe Rust code to trigger a use-after-free: the OwnedView::decode constructor transmuted a borrowed slice to &'static u8, and the Deref...

CVE-2026-59864 Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions

Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, kiota plugin add and kiota plugin generate with -t APIPlugin emitted attacker-controlled statictemplate.file values from x-ai-adaptive-card and x-ai-capabilities into generated Microsoft 365 Copilot and Teams plugin...

CVE-2026-59864

Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, kiota plugin add and kiota plugin generate with -t APIPlugin emitted attacker-controlled statictemplate.file values from x-ai-adaptive-card and x-ai-capabilities into generated Microsoft 365 Copilot and Teams plugin...

Amazon Linux 2023 : expat, expat-devel, expat-static (ALAS2023-2026-1900)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1900 advisory. In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers...

CVE-2026-44453: Memory Allocation with Excessive Size Value

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 6b5370d, h2o is vulnerable to a Denial of Service attack when calling alloca under certain conditions. When serving static files, h2o builds the file path on stack, by calling alloca. The maximum size of the memor...

PT-2026-60604

Name of the Vulnerable Software and Affected Versions h2o versions prior to commit 6b5370d Description A Denial of Service issue exists when the server serves static files. The software builds the file path on the stack using the alloca function. Under certain conditions, the memory allocated via...

PT-2026-60489

Name of the Vulnerable Software and Affected Versions Kiota versions prior to 1.29.1 Kiota versions prior to 1.32.5 Description Kiota, an OpenAPI based HTTP Client code generator, fails to validate paths provided in the x-ai-adaptive-card and x-ai-capabilities extensions when using the kiota plug...

Moderate: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

An update for Red Hat Hardened Images RPMs is now available. This update includes the following RPMs: glib2: glib2-2.89.1-1.2.hum1 aarch64, x8664 glib2-devel-2.89.1-1.2.hum1 aarch64, x8664 glib2-doc-2.89.1-1.2.hum1 aarch64, x8664 glib2-static-2.89.1-1.2.hum1 aarch64, x8664...

CVE-2026-49867

DataEase is an open source data visualization and analysis tool. Prior to 2.10.23, DataEase template static resources let authenticated users submit TemplateManageRequest.staticResource through POST /de2api/templateManage/save or DataVisualizationServer.decompression, after which...