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bdu:2026-07258

certfr-2026-avi-0316 — De multiples vulnérabilités ont été découvertes dans les produits VMware. Elles permettent à un attaquant de provoquer…

certfr-2026-avi-0316

Withdrawn: CLEANSTART-2026-AD27625 — Security fixes for CVE-2022-25881, CVE-2022-33987, CVE-2025-25285, CVE-2025-62718, CVE-2025-69873, CVE-2026-21637, CVE-…

Withdrawn by the publisher.

Affected: CleanStart: mongosh

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

EUVD-2026-275213

fkie_cve-2026-31802

node-tar is a full-featured Tar for Node.js. Prior to version 7.5.11, tar (npm) can be tricked into creating a symlink that points outside the extraction directory by using a drive-relative symlink target such as C:../../../target.txt, which enables file overwrite outside cwd during normal tar.x() extraction. This vulnerability is fixed in 7.5.11.

GHSA-9ppj-qmqm-q256 — node-tar Symlink Path Traversal via Drive-Relative Linkpath

Affected: npm: tar

### Summary `tar` (npm) can be tricked into creating a symlink that points outside the extraction directory by using a drive-relative symlink target such as `C:../../../target.txt`, which enables file overwrite outside `cwd` during normal `tar.x()` extraction.

### Details The extraction logic in `Unpack[STRIPABSOLUTEPATH]` validates `..` segments against a resolved path that still uses the original drive-relative value, and only afterwards rewrites the stored `linkpath` to the stripped value.

What happens with `linkpath: "C:../../../target.txt"`: 1. `stripAbsolutePath()` removes `C:` and rewrites the value to `../../../target.txt`. 2. The escape check resolves using the original pre-stripped value, so it is treated as in-bounds and accepted. 3. Symlink creation uses the rewritten value (`../../../target.txt`) from nested path `a/b/l`. 4. Writing through the extracted symlink overwrites the outside file (`../target.txt`).

This is reachable in standard usage (`tar.x({ cwd, file })`) when extracting attacker-controlled tar archives.

### PoC Tested on Arch Linux with `tar@7.5.10`.

PoC script (`poc.cjs`):

```js const fs = require('fs') const path = require('path') const { Header, x } = require('tar')

const cwd = process.cwd() const target = path.resolve(cwd, '..', 'target.txt') const tarFile = path.join(cwd, 'poc.tar')

fs.writeFileSync(target, 'ORIGINAL\n')

const b = Buffer.alloc(1536) new Header({ path: 'a/b/l', type: 'SymbolicLink', linkpath: 'C:../../../target.t…

msrc_CVE-2026-31802 — node-tar Symlink Path Traversal via Drive-Relative Linkpath

msrc_CVE-2026-31802

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…

UBUNTU-CVE-2026-31802

Affected: Ubuntu:Pro:14.04:LTS: node-tar, Ubuntu:Pro:16.04:LTS: node-tar, Ubuntu:18.04:LTS: node-tar, Ubuntu:Pro:20.04:LTS: node-tar, Ubuntu:22.04:LTS: node-tar, Ubuntu:24.04:LTS: node-tar, Ubuntu:25.10: node-tar, Ubuntu:26.04:LTS: node-tar

WID-SEC-W-2026-1220 — IBM App Connect Enterprise: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in IBM App Connect Enterprise ausnutzen, um Dateien zu manipulieren, und um einen Denial of Service Angriff durchzuführen.