Know what to patch next.

Published open-source security advisories, matched to the exact versions you run.

Run in a terminal

$ claude mcp add --scope user --transport http patchnext https://mcp.patchnext.com && claude mcp login patchnext

Your browser opens: sign in and choose what the agent may read.

Then ask: What do I need to patch on this machine?

New: 965 Actionable advisories published in the last 30 days (UTC), within the selected severities, against 1,080 in the 30 days before.
Critical: 66 Actionable advisories published in the last 30 days (UTC) and rated CVSS 9.0 or higher, within the selected severities.

Exploited: 132 All actionable advisories, of any publish date, that CISA's Known Exploited Vulnerabilities catalog confirms are exploited in the wild, within the selected severities. Show them in the feed.

Advisories per daypartial

Actionable

5251–5275 of 30,970 matching · newest first

ExploitedClear filters

High, CVSS 8.715 Jun 2026
Nest: Middleware Bypass on Fastify via Trailing Slash
npm @nestjs/platform-fastify · Upgrade to 11.1.24 or later · <= 11.1.23 · CVE-2026-54281 · GHSA-6v32-fjc9-9qf6 · amended
15 Jun 2026Evidence →
High, CVSS 7.515 Jun 2026
python-multipart: Quadratic-time querystring parsing with semicolon separators causes CPU denial of service
PyPI python-multipart · Upgrade to 0.0.30 or later · < 0.0.30 · CVE-2026-53539 · GHSA-5rvq-cxj2-64vf · amended
15 Jun 2026Evidence →
Low, CVSS 3.715 Jun 2026
python-multipart: Negative Content-Length in parse_form buffers the entire body in memory
PyPI python-multipart · Upgrade to 0.0.31 or later · < 0.0.31 · CVE-2026-53540 · GHSA-v9pg-7xvm-68hf · amended
15 Jun 2026Evidence →
Low, CVSS 3.715 Jun 2026
python-multipart: Semicolon treated as querystring field separator enables parameter smuggling
PyPI python-multipart · Upgrade to 0.0.30 or later · < 0.0.30 · CVE-2026-53538 · GHSA-6jv3-5f52-599m · amended
15 Jun 2026Evidence →
Low, CVSS 3.715 Jun 2026
python-multipart: Content-Disposition parameter smuggling via RFC 2231/5987 extended parameters
PyPI python-multipart · Upgrade to 0.0.30 or later · < 0.0.30 · CVE-2026-53537 · GHSA-vffw-93wf-4j4q · amended
15 Jun 2026Evidence →
Critical, CVSS 9.315 Jun 2026
Electron: Buffer performs incorrect byte length calculations resulting in heap buffer under/overflow
npm electron · Upgrade to 42.3.3 or later · >= 42.3.1, < 42.3.3 · CVE-2026-54257 · GHSA-q6m5-f73j-m9mc · amended
15 Jun 2026Evidence →
High, CVSS 7.715 Jun 2026
Tornado: Authorization header forwarded across cross-origin redirects in SimpleAsyncHTTPClient
PyPI tornado · Upgrade to 6.5.6 or later · < 6.5.6 · CVE-2026-49853 · GHSA-3x9g-8vmp-wqvf · amended
15 Jun 2026Evidence →
High, CVSS 7.515 Jun 2026
tornado AsyncHTTPClient accumulates decompressed chunks without size limit (gzip bomb)
PyPI tornado · Upgrade to 6.5.6 or later · < 6.5.6 · CVE-2026-49855 · GHSA-mgf9-4vpg-hj56 · amended
15 Jun 2026Evidence →
High, CVSS 7.515 Jun 2026
Starlette: SSRF and NTLM credential theft via UNC paths in StaticFiles on Windows
PyPI starlette · Upgrade to 1.1.0 or later · < 1.1.0 · CVE-2026-48818 · GHSA-wqp7-x3pw-xc5r · amended
15 Jun 2026Evidence →
Medium, CVSS 5.315 Jun 2026
Starlette: Arbitrary HTTP method dispatched to HTTPEndpoint attributes via getattr
PyPI starlette · Upgrade to 1.1.0 or later · < 1.1.0 · CVE-2026-48817 · GHSA-x746-7m8f-x49c · amended
15 Jun 2026Evidence →
Medium, CVSS 5.315 Jun 2026
UAParser.js: Unbounded Sec-CH-UA-Model parsing can trigger ReDoS in withClientHints()
npm ua-parser-js · Upgrade to 2.0.10 or later · >= 2.0.1, < 2.0.10 · CVE-2026-48125 · GHSA-9h5v-pfqq-x599 · amended
15 Jun 2026Evidence →
High, CVSS 8.215 Jun 2026
protobufjs-cli: Code injection in pbjs static output from crafted JSON descriptor names
npm protobufjs-cli · Upgrade to 2.5.0 or 1.3.2 by release line · <= 1.3.1; >= 2.0.0, <= 2.4.2 · CVE-2026-54271 · GHSA-pr59-h9ph-3fr8 · amended
15 Jun 2026Evidence →
Medium, CVSS 5.315 Jun 2026
protobufjs: Memory amplification from preserved unknown fields in binary decode
npm protobufjs · Upgrade to 8.5.0 or later · >= 8.2.0, <= 8.4.2 · CVE-2026-54270 · GHSA-94rc-8x27-4472 · amended
15 Jun 2026Evidence →
Low, CVSS 2.115 Jun 2026
DOMPurify: Trusted Types policy survives clearConfig() and can poison later RETURN_TRUSTED_TYPE output
npm dompurify · Upgrade to 3.4.9 or later · < 3.4.9 · CVE-2026-65899 · GHSA-vxr8-fq34-vvx9 · amended
15 Jun 2026Evidence →
High, CVSS 7.515 Jun 2026
Vulnerable OpenSSL included in cryptography wheels
PyPI cryptography · Upgrade to 48.0.1 or later · >= 0.5.0, < 48.0.1 · GHSA-537c-gmf6-5ccf · amended
15 Jun 2026Evidence →
High, CVSS 7.515 Jun 2026
Microsoft Security Advisory CVE-2026-45591 – ASP.NET Core Denial of Service Vulnerability
NuGet microsoft.aspnetcore.signalr.protocols.messagepack +3 · Upgrade all 4 to 10.0.9, 9.0.17 or 8.0.28 by release line · >= 8.0.0, <= 8.0.27; >= 9.0.0, <= 9.0.16; >= 10.0.0, <= 10.0.8 · CVE-2026-45591 · GHSA-f8h2-vmm9-qhj6
15 Jun 2026Evidence →
Medium, CVSS 6.615 Jun 2026
aiohttp: Incomplete websocket frame payloads bypass memory limits
PyPI aiohttp · Upgrade to 3.14.1 or later · <= 3.14.0 · CVE-2026-54274 · GHSA-xcgm-r5h9-7989 · amended
15 Jun 2026Evidence →
Low, CVSS 2.715 Jun 2026
aiohttp: TLS Server Hostname Override Is Ignored When Reusing HTTPS Connections
PyPI aiohttp · Upgrade to 3.14.1 or later · <= 3.14.0 · CVE-2026-54275 · GHSA-4m7w-qmgq-4wj5 · amended
15 Jun 2026Evidence →
Low, CVSS 1.715 Jun 2026
aiohttp: Payload Response Resources Are Not Closed After Mid-Body Disconnect
PyPI aiohttp · Upgrade to 3.14.1 or later · <= 3.14.0 · CVE-2026-54280 · GHSA-9x8q-7h8h-wcw9 · amended
15 Jun 2026Evidence →
Medium, CVSS 6.615 Jun 2026
aiohttp: HTTP/1 Pipelined Requests Queue Without Limit
PyPI aiohttp · Upgrade to 3.14.1 or later · <= 3.14.0 · CVE-2026-54273 · GHSA-4fvr-rgm6-gqmc · amended
15 Jun 2026Evidence →
Medium, CVSS 6.615 Jun 2026
aiohttp: Unread Compressed Request Bodies Bypass client_max_size During Cleanup
PyPI aiohttp · Upgrade to 3.14.1 or later · <= 3.14.0 · CVE-2026-54278 · GHSA-g3cq-j2xw-wf74 · amended
15 Jun 2026Evidence →
Medium, CVSS 6.615 Jun 2026
aiohttp: C HTTP Parser Bypasses max_line_size for Fragmented Lines
PyPI aiohttp · Upgrade to 3.14.1 or later · <= 3.14.0 · CVE-2026-54277 · GHSA-63hw-fmq6-xxg2 · amended
15 Jun 2026Evidence →
Medium, CVSS 6.315 Jun 2026
aiohttp: DigestAuthMiddleware Applies Credentials to Cross-Origin Redirect Challenges
PyPI aiohttp · Upgrade to 3.14.1 or later · <= 3.14.0 · CVE-2026-54276 · GHSA-hpj7-wq8m-9hgp · amended
15 Jun 2026Evidence →
Low, CVSS 1.315 Jun 2026
aiohttp: Host-Only Cookies Become Domain Cookies After CookieJar Persistence
PyPI aiohttp · Upgrade to 3.14.1 or later · < 3.14.1 · CVE-2026-54279 · GHSA-2fqr-mr3j-6wp8 · amended
15 Jun 2026Evidence →
Low, CVSS 2.715 Jun 2026
aiohttp: CRLF injection in multipart headers
PyPI aiohttp · Upgrade to 3.14.0 or later · <= 3.13.5 · CVE-2026-50269 · GHSA-m6qw-4cw2-hm4m · amended
15 Jun 2026Evidence →

A vendor fix does not resolve your finding until you verify it in your own systems.

News

Security reports that are not matched to your stack.

CISA security events · all vendors

NewsExploited · CISA KEV10 Nov 2026
Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability
NewsExploited · CISA KEV10 Nov 2026
Barracuda Networks Email Security Gateway (ESG) Authentication Bypass Using an Alternate Path or Channel Vulnerability
NewsExploited · CISA KEV10 Nov 2026
Openwave Messaging Limited Webtop Media Transcoder Incorrect Resource Transfer Between Spheres Vulnerability
NewsExploited · CISA KEV10 Nov 2026
Google Chromium Use-After-Free Vulnerability
NewsExploited · CISA KEV10 Nov 2026
Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability

Advisory watch · no fix evidence

NewsUnratednpm12 Nov 2026
Malicious code in @rfewqa-fes/mnm-doc-mcp (npm)
Listed as news: the source report lacks affected versions, a fix, or verified evidence.
NewsUnratednpm11 Nov 2026
Malicious code in teahy-znrpz-util (npm)
Listed as news: the source report lacks affected versions, a fix, or verified evidence.
NewsUnratednpm11 Nov 2026
Malicious code in mock-data-sdk (npm)
Listed as news: the source report lacks affected versions, a fix, or verified evidence.
NewsUnratednpm11 Nov 2026
Malicious code in fcefi-wdojs-util (npm)
Listed as news: the source report lacks affected versions, a fix, or verified evidence.
NewsUnratednpm11 Nov 2026
Malicious code in tailwindcss-hook-forms (npm)
Listed as news: the source report lacks affected versions, a fix, or verified evidence.

Browse all news

Know what to patch next.

Actionable

Nest: Middleware Bypass on Fastify via Trailing Slash

python-multipart: Quadratic-time querystring parsing with semicolon separators causes CPU denial of service

python-multipart: Negative Content-Length in parse_form buffers the entire body in memory

python-multipart: Semicolon treated as querystring field separator enables parameter smuggling

python-multipart: Content-Disposition parameter smuggling via RFC 2231/5987 extended parameters

Electron: Buffer performs incorrect byte length calculations resulting in heap buffer under/overflow

Tornado: Authorization header forwarded across cross-origin redirects in SimpleAsyncHTTPClient

tornado AsyncHTTPClient accumulates decompressed chunks without size limit (gzip bomb)

Starlette: SSRF and NTLM credential theft via UNC paths in StaticFiles on Windows

Starlette: Arbitrary HTTP method dispatched to `HTTPEndpoint` attributes via `getattr`

UAParser.js: Unbounded `Sec-CH-UA-Model` parsing can trigger ReDoS in `withClientHints()`

protobufjs-cli: Code injection in pbjs static output from crafted JSON descriptor names

protobufjs: Memory amplification from preserved unknown fields in binary decode

DOMPurify: Trusted Types policy survives `clearConfig()` and can poison later `RETURN_TRUSTED_TYPE` output

Vulnerable OpenSSL included in cryptography wheels

Microsoft Security Advisory CVE-2026-45591 – ASP.NET Core Denial of Service Vulnerability

aiohttp: Incomplete websocket frame payloads bypass memory limits

aiohttp: TLS Server Hostname Override Is Ignored When Reusing HTTPS Connections

aiohttp: Payload Response Resources Are Not Closed After Mid-Body Disconnect

aiohttp: HTTP/1 Pipelined Requests Queue Without Limit

aiohttp: Unread Compressed Request Bodies Bypass client_max_size During Cleanup

aiohttp: C HTTP Parser Bypasses max_line_size for Fragmented Lines

aiohttp: DigestAuthMiddleware Applies Credentials to Cross-Origin Redirect Challenges

aiohttp: Host-Only Cookies Become Domain Cookies After CookieJar Persistence

aiohttp: CRLF injection in multipart headers

News

CISA security events · all vendors

Advisory watch · no fix evidence

Know what to patch next.

At a glance

Activity · last 26 weeks

Actionable

News

CISA security events · all vendors

Advisory watch · no fix evidence