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certfr-2026-avi-0958 — De multiples vulnérabilités ont été découvertes dans les produits IBM. Certaines d'entre elles permettent à un attaquan…

certfr-2026-avi-0958

Withdrawn: CLEANSTART-2026-BE61221 — Security fixes for CVE-2025-62718, CVE-2025-69873, CVE-2026-29045, CVE-2026-29085, CVE-2026-29086, CVE-2026-29087, CVE-…

Withdrawn by the publisher.

Affected: CleanStart: opensearch-dashboards-fips

Multiple security vulnerabilities affect the opensearch-dashboards-fips package. These issues are resolved in later releases. See references for individual vulnerability details.

EUVD-2026-275123

fkie_cve-2026-30827

express-rate-limit is a basic rate-limiting middleware for Express. In versions starting from 8.0.0 and prior to versions 8.0.2, 8.1.1, 8.2.2, and 8.3.0, the default keyGenerator in express-rate-limit applies IPv6 subnet masking (/56 by default) to all addresses that net.isIPv6() returns true for. This includes IPv4-mapped IPv6 addresses (::ffff:x.x.x.x), which Node.js returns as request.ip on dual-stack servers. Because the first 80 bits of all IPv4-mapped addresses are zero, a /56 (or any /32 to /80) subnet mask produces the same network key (::/56) for every IPv4 client. This collapses all IPv4 traffic into a single rate-limit bucket: one client exhausting the limit causes HTTP 429 for all other IPv4 clients. This issue has been patched in versions 8.0.2, 8.1.1, 8.2.2, and 8.3.0.

GHSA-46wh-pxpv-q5gq — express-rate-limit: IPv4-mapped IPv6 addresses bypass per-client rate limiting on servers with dual-stack network

Affected: npm: express-rate-limit

## Summary

The default `keyGenerator` in express-rate-limit applies IPv6 subnet masking (`/56` by default) to all addresses that `net.isIPv6()` returns true for. This includes IPv4-mapped IPv6 addresses (`::ffff:x.x.x.x`), which Node.js returns as `request.ip` on dual-stack servers.

Because the first 80 bits of all IPv4-mapped addresses are zero, a `/56` (or any `/32` to `/80`) subnet mask produces the same network key (`::/56`) for **every** IPv4 client. This collapses all IPv4 traffic into a single rate-limit bucket: one client exhausting the limit causes HTTP 429 for all other IPv4 clients.

## Details

### Root Cause

In `source/ip-key-generator.ts`:

```typescript export function ipKeyGenerator(ip: string, ipv6Subnet: number | false = 56) { if (ipv6Subnet && isIPv6(ip)) { return `${new Address6(`${ip}/${ipv6Subnet}`).startAddress().correctForm()}/${ipv6Subnet}` } return ip } ```

`net.isIPv6('::ffff:192.168.1.1')` returns `true`, so IPv4-mapped addresses enter the subnet masking path. With a `/56` prefix, the start address for any `::ffff:x.x.x.x` is `::`, producing the key `::/56`.

### Proof of Concept

```javascript const { isIPv6 } = require('net'); const { Address6 } = require('ip-address');

function ipKeyGenerator(ip, ipv6Subnet = 56) { if (ipv6Subnet && isIPv6(ip)) { return `${new Address6(`${ip}/${ipv6Subnet}`).startAddress().correctForm()}/${ipv6Subnet}`; } return ip; }

console.log(ipKeyGenerator('::ffff:192.168.1.1', 56)); // ::/56 cons…

RHSA-2026:21772 — Red Hat Security Advisory: Red Hat OpenShift Dev Spaces 3.28.0 Release.

bouncycastle: BC-JAVA: GOSTCTR implementation unable to process more than 255 blocks correctly crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption bouncycastle: BC-JAVA: LDAP injection vulnerability in LDAPStoreHelper.java undici: Undici: HTTP Request Smuggling and Denial of Service due to duplicate Content-Length headers undici: undici: Denial of Service via unbounded memory consumption during WebSocket permessage-deflate decompression undici: undici: Denial of Service via crafted WebSocket frame with large length org.eclipse.jetty/jetty-server: Eclipse Jetty: Denial of Service due to unreleased JDK Inflater from compressed HTTP requests undici: Undici: Denial of Service via invalid WebSocket permessage-deflate extension parameter markdown-it: markdown-it: Denial of Service via Regular Expression Denial of Service in linkify function bouncycastle: BC-JAVA: PKIX draft CompositeVerifier accepts empty signature sequence as valid minimatch: minimatch: Denial of Service via specially crafted glob patterns minimatch: Minimatch: Denial of Service via catastrophic backtracking in glob expressions svgo: SVGO: Denial of Service via XML entity expansion express-rate-limit: express-rate-limit: Denial of Service for IPv4 clients due to incorrect IPv6 subnet masking tar: tar: File overwrite via drive-relative symlink traversal flatted: flatted: Unbounded recursion DoS in parse() revive phase crypto/x509: crypto/tls: golang: Go: Denial of Service vulnera…

WID-SEC-W-2026-0935 — Red Hat Ansible Automation Platform: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Ansible Automation Platform ausnutzen, um einen Denial of Service Angriff durchzuführen, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder Cross-Site-Scripting-Angriffe durchzuführen.