Microsoft Security Advisory CVE-2026-56170 – .NET Denial of Service Vulnerability

Microsoft Security Advisory CVE-2026-56170 – .NET Denial of Service Vulnerability Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core SignalR Microsoft.AspNetCore.App.Runtime. This advisory also provides guidance on what...

Microsoft Security Advisory CVE-2026-50526 – .NET Tampering Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET SDK Microsoft.NET.Build.Containers. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A tampering...

Microsoft Security Advisory CVE-2026-47300 – .NET Elevation of Privilege Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core Negotiate Authentication Microsoft.AspNetCore.Authentication.Negotiate. This advisory also provides guidance on what developers can do to update their applications to remov...

Microsoft Security Advisory CVE-2026-47303 – .NET Elevation of Privilege Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core Negotiate Authentication Microsoft.AspNetCore.Authentication.Negotiate. This advisory also provides guidance on what developers can do to update their applications to remov...

Microsoft Security Advisory CVE-2026-50527 – .NET Denial of Service Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET XML Encryption System.Security.Cryptography.Xml. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial ...

Microsoft Security Advisory CVE-2026-50650 – .NET Elevation of Privilege Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in Windows Presentation Foundation WPF. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. An elevation of privilege...

Loofah `allowed_uri?` does not detect `javascript:` URIs split by named whitespace character references

Summary Loofah::HTML5::Scrub.alloweduri? does not correctly reject javascript: URIs when the scheme is split or prefixed by the HTML5 named character references tab or line feed. This is a bypass of the fix for GHSA-46fp-8f5p-pf2m, which handled the equivalent numeric character references , , but...

Guzzle: URI fragments disclosed in redirect Referer headers

Impact When the optional referer redirect setting is enabled, affected versions of RedirectMiddleware can copy the fragment from the referring request URI into a generated Referer header. A URI fragment is the part after . It is handled locally by the client and is not part of the HTTP request...

Guzzle: Host-only cookie scope is not preserved

Impact In affected versions, CookieJar does not preserve whether a response cookie was set without a Domain attribute or with an empty one. A cookie without Domain is host-only and must be returned only to the exact host that set it. Under current cookie processing rules, an empty Domain value is...

Guzzle: Unbounded response cookies risk denial of service

Impact In affected versions, Guzzle's built-in CookieJar accepts any number of Set-Cookie header fields from one response, with no limit on the size of each field. When a later request matches the stored cookies, Guzzle places every match into one generated Cookie header without limiting the numb...

Astro: composable `astro/hono` pipeline bypasses `security.checkOrigin` when `middleware()` is absent or misordered

Summary In the composable astro/hono pipeline, the security.checkOrigin protection is only installed by the middleware primitive. The actions and pages primitives each dispatch to user code independently, so a pipeline that mounts either primitive before or without middleware will bypass the orig...

@astrojs/netlify generates an overly-broad Netlify Image CDN allowlist because remotePatterns.pathname metacharacters are not escaped

Summary The @astrojs/netlify adapter converts each image.remotePatterns entry into a regular expression that is written to .netlify/v1/config.json under images.remoteimages. Netlify's Image CDN uses these regexes as the allowlist that decides which remote image URLs it will optimize...

body-parser vulnerable to denial of service when invalid limit value silently disables size enforcement

Impact When body-parser is configured with an invalid limit option value, such as an unparseable string or NaN, bytes.parse returns null and the request body size check is silently skipped. Applications that rely on limit as their primary safeguard against oversized request bodies will accept...

@astrojs/node: Backslash-prefixed paths not recognized as internal by trailing-slash redirect

Impact With trailingSlash: 'always' configured, the @astrojs/node standalone server's static file handler appends a trailing slash to request paths and issues a 301 redirect. Paths beginning with /\ slash-backslash were not recognized as internal paths, so the handler would echo the raw path back...

Astro: XSS via unescaped spread attribute names in renderHTMLElement (incomplete fix for CVE-2026-54298)

Summary The fix for CVE-2026-54298 GHSA-jrpj-wcv7-9fh9 added an INVALIDATTRNAMECHAR guard to addAttribute so that spread-prop attribute names containing "' /= or whitespace are dropped. A second attribute-rendering path, renderHTMLElement in packages/astro/src/runtime/server/render/dom.ts, has it...

@astrojs/rss: XML Injection via Unescaped RSS Feed Fields

Summary In @astrojs/rss, the source.title and enclosure.type item fields are interpolated directly into XML template strings without XML-character escaping before being parsed by fast-xml-parser. An attacker who controls these field values can inject arbitrary XML elements into the generated RSS...

Astro: Cross-site scripting via unescaped transition:* directive values on hydrated islands

Summary When a transition:persist, transition:scope, or transition:persist-props directive is applied to a client-hydrated client: component, Astro copied the directive value onto the rendered element without HTML-escaping it. If a developer reflects attacker-controlled input into one of these...

Pillow: Controlled heap out-of-bounds write in Pillow `ImageCmsTransform.apply()` via output mode mismatch

Summary Pillow's public ImageCms.ImageCmsTransform.applyim, imOut API can trigger controlled native heap corruption when the caller supplies an output image whose mode does not match the transform's declared output mode. For example, a transform built as RGBA - RGBA can be applied to an L output...

Pillow JPEG2000 tiled decode retains a growing scratch buffer and can be used for denial of service

Summary src/libImaging/Jpeg2KDecode.c:853 accumulates totalcomponentwidth across every tile in a JPEG2000 image instead of recomputing it per tile. That accumulated value is then used in the tilebytes calculation at src/libImaging/Jpeg2KDecode.c:868, which can make the decoder grow state-buffer v...

Pillow EpsImagePlugin negative %%BeginBinary byte count causes infinite loop denial of service

Summary Pillow's EPS parser PIL/EpsImagePlugin.py accepts a negative byte count in the %%BeginBinary directive. A crafted EPS file can cause Image.open to seek backwards to the same directive and parse it repeatedly, resulting in an infinite loop and CPU denial of service. The issue is triggered...

Pillow: Decompression Bomb DoS via PdfParser.PdfStream.decode()

Summary PdfParser.PdfStream.decode in Pillow's PdfParser.py calls zlib.decompress with the bufsize parameter set to the value of the PDF stream's Length field, without any upper bound on the actual decompressed output size. Python's zlib.decompress bufsize argument is an initial output buffer hin...

Pillow: Heap out-of-bounds write `Image.paste()` / `Image.crop()` via signed coordinate overflow

Summary Pillow's public image coordinate APIs can trigger a native heap out-of-bounds write when given coordinates near the signed 32-bit integer limits. In 4-byte pixel modes such as RGBA, this becomes a controlled backward heap underwrite: for a source image of width W, Pillow writes 4 W...

Pillow TGA RLE encoder can serialize up to ~57 KB of adjacent heap data into generated images

Summary Pillow's TGA RLE encoder reads past its row buffer when saving a mode "1" image. Adjacent process heap bytes can be copied into the generated TGA file. The bug is reachable through the public save API: python im.saveout, format="TGA", compression="tgarle" Older affected Pillow versions us...

Pillow: Heap out-of-bounds write in `ImageFilter.RankFilter` via integer overflow in `ImagingExpand`

Summary Pillow's public rank-filter API can trigger a native heap out-of-bounds write when given a very large odd filter size. Minimal public API trigger: python from PIL import Image, ImageFilter im = Image.new"L", 3, 3, 128 im.filterImageFilter.MedianFilter4294967295 ImageFilter.RankFilter.filt...

Microsoft Security Advisory CVE-2026-50651 – .NET Denial of Service Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET HTTP client System.Net.Http. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial of service...

Microsoft Security Advisory CVE-2026-50659 – .NET Spoofing Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET SMTP client System.Net.Mail. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A spoofing vulnerability exis...

Microsoft Security Advisory CVE-2026-50525 – .NET Denial of Service Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET XML Encryption System.Security.Cryptography.Xml. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial ...

Microsoft Security Advisory CVE-2026-50528 – .NET Security Feature Bypass Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET TLS/SSL System.Net.Security. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A security feature bypass...

Microsoft Security Advisory CVE-2026-50648 – .NET Denial of Service Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET XML Encryption System.Security.Cryptography.Xml. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial ...

Microsoft Security Advisory CVE-2026-50524 – .NET Denial of Service Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET TLS/SSL System.Net.Security. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial of service...

Microsoft Security Advisory CVE-2026-47304 – .NET Security Feature Bypass Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET XML Encryption System.Security.Cryptography.Xml. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A securit...

Microsoft Security Advisory CVE-2026-47302 – .NET Denial of Service Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET XML processing System.Security.Cryptography.Xml, System.Xml. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerabilit...

Microsoft Security Advisory CVE-2026-57108 – .NET Denial of Service Vulnerability

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in the .NET runtime cryptography layer CryptoNativeGetX509NameInfo. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability...

Axios Node HTTP adapter can use an inherited proxy after interceptor config cloning

Summary Axios’ Node.js HTTP adapter can route requests through an attacker-controlled proxy when Object.prototype.proxy is polluted and request configuration is materialized as a regular object before dispatch. Recent axios releases harden merged request config by creating a null-prototype object...

Axios form serializer maxDepth bypass via {} metatoken

Summary Axios versions in the fixed lines for GHSA-62hf-57xw-28j9 still contain an incomplete depth-limit bypass in lib/helpers/toFormData.js. When serializing an object with a top-level key ending in , axios calls JSON.stringify on that value before the formSerializer.maxDepth guard can inspect...

Axios: Nested axios option objects can consume polluted prototype values

Summary Axios can consume inherited properties from nested request option objects when the JavaScript process already has a polluted Object.prototype. The top-level merged config is protected with a null prototype, but nested plain objects such as auth and paramsSerializer are cloned into ordinar...

Axios: HTTP/2 streamed uploads bypass `maxBodyLength`

Summary Axios versions with Node.js HTTP/2 support allow streamed request bodies to bypass maxBodyLength enforcement when requests are sent with httpVersion: 2. This affects applications that rely on maxBodyLength as a hard cap while forwarding attacker-controlled streams, such as upload endpoint...

Axios: Fetch adapter `ReadableStream` uploads bypass `maxBodyLength`

Summary axios’ fetch adapter does not enforce maxBodyLength for live WHATWG ReadableStream request bodies whose size cannot be determined before dispatch. Applications that use adapter: "fetch" and rely on maxBodyLength to cap untrusted upload/proxy streams can send the full stream even when it...

Axios: Prototype pollution gadgets can alter axios request construction

Summary axios is vulnerable to read-side prototype-pollution gadgets when Object.prototype has already been polluted by another vulnerability or dependency. The most broadly reachable issue is in the bodyless method aliases: axios.get, axios.delete, axios.head, and axios.options read inherited da...

Axios: NO_PROXY bypass for 0.0.0.0 local addresses in axios

Summary Axios versions containing lib/helpers/shouldBypassProxy.js do not treat 0.0.0.0 as a local address when evaluating NOPROXY rules. In Node.js applications that use HTTPPROXY or HTTPSPROXY together with NOPROXY=localhost,127.0.0.1,::1 or similar, a request to http://0.0.0.0:/ can be routed...

File Browser: Colliding username normalization gives two users the same home directory

Summary FileBrowser confines each user to a scope: a home directory that acts as the boundary for everything they can read or write. When self-registration and automatic home-directory creation are both enabled Signup=true and CreateUserDir=true, a new user's scope is built from their username...

File Browser: Share API exposes the password hash and bypass token

Summary When a user creates a password-protected share or lists existing shares, the JSON response includes the full bcrypt passwordhash and the secret token of the share. The Link storage struct is serialized directly with json.Marshal and tags passwordhash and token for output, with no field...

File Browser: Archive builder turns backslash filenames into path traversal (zip-slip)

Summary The fix for GHSA-gxjx-7m74-hcq8 / CVE-2026-54093 shipped in v2.63.6 added a strings.ReplaceAllnameInArchive, "\", "/" step to the archive builder; this was the advisory's recommended "Primary Fix." On a Linux host a backslash is a legal, non-separator filename character, so replacing it...

protobufjs: Text Format string map parsing can mutate returned map object prototype

Summary The protobuf.js text format extension parsed string-keyed map entries using ordinary property assignment. A text-format map entry with key proto could therefore change the prototype of the returned map object instead of creating an own map entry. This affected the optional Text Format...

protobufjs: Denial of Service via infinite loop in .proto option parsing

Summary protobufjs parsed option names by advancing through schema tokens until it reached an = token, without checking for end of input. A crafted .proto schema that opens an option declaration but ends prematurely could cause the option parser to loop without ever terminating. This affects the...

webpack-dev-server vulnerable to denial of service via a malformed Host or Origin header

Impact An unauthenticated peer that can reach the webpack-dev-server process can terminate it by sending either a normal HTTP request with a malformed Host header, or a WebSocket upgrade to the default /ws endpoint with a malformed Origin header. The malformed header triggers an uncaught exceptio...

webpack-dev-server vulnerable to cross-site request forgery via internal developer endpoints

Impact The internal /webpack-dev-server/open-editor and /webpack-dev-server/invalidate endpoints perform state-changing actions on any GET request, without verifying that the request originated from the dev server's own page. Any website a developer visits while the dev server is running can...

Guzzle: Cookie Disclosure and Injection via IP-Address Domains

Impact CookieJar does not restrict a cookie scoped to an IP address to the exact host that set it. When a stored cookie's Domain attribute is an IPv4 literal Domain=192.168.0.1, a bracketed IPv6 literal Domain=::1, or a bare numeric value that denotes an IPv4 address Domain=1, which is 0.0.0.1,...

Astro: Authorization Bypass via Decode Iteration Limit and Rewrite Path Canonicalization Mismatch

Astro 6.4.7 Authorization Bypass via Decode Iteration Limit and Rewrite Path Canonicalization Mismatch Summary Astro 6.4.7 appears to reintroduce a middleware authorization bypass pattern when a request path is encoded more deeply than the newly introduced iterative URL decoder's maximum decoding...

Composer: Path traversal in package bin field lets dependencies chmod arbitrary host files

Summary A Composer package declares its executables in the bin field of its composer.json. When Composer installs a package, it processes each bin entry and changes the file mode of the corresponding file so it is executable. If a bin entry contains .. path segments, it can resolve to a path...