---
title: "Security digest: September 29, 2026"
url: https://erroneo.us/security/2026-09-29/
description: "September 29, 2026 vulnerability digest: 1 CISA KEV addition (Apple); 2 critical advisories (npm, PyPI). What to patch and who can relax."
type: security-digest-day
section: "Security Digest"
date_published: 2026-09-29
date_modified: 2026-09-29
publisher: erroneo.us
author: erroneo.us Security Desk
license: All rights reserved. Quote with attribution and a link.
---

# Security digest: September 29, 2026

1 known exploited (cisa kev) addition and 2 critical advisories.

## Take stock

- Do you run any of these? Apple Multiple Products. They are being exploited in the wild (CISA KEV). Patch or mitigate if you do; CISA’s federal deadline is 2026-10-13.
- npm: 1 critical advisory ( @xhmikosr/decompress , decompress ). Check with npm audit (or: npm ls <package>) .
- PyPI: 1 critical advisory ( PyJWT ). Check with pip-audit (or: pip show <package>) .
- None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.

## Known exploited (CISA KEV)

- [CVE-2026-86950](https://erroneo.us/security/cve/CVE-2026-86950/index.md) Apple Multiple Products: Apple Multiple Products Out-of-Bounds Write Vulnerability (CISA due 2026-10-13)

## Critical advisories

- [CVE-2026-101894](https://erroneo.us/security/cve/CVE-2026-101894/index.md) @xhmikosr/decompress: Path traversal via symlink chain — npm @xhmikosr/decompress >= 11.0.0, <= 11.1.3 → 11.1.4; npm @xhmikosr/decompress <= 10.2.1 → 10.2.2; npm decompress <= 4.2.1 → no fix
- [CVE-2026-102268](https://erroneo.us/security/cve/CVE-2026-102268/index.md) PyJWT: Asymmetric-PEM detection bypass: whitespace/line-ending-mutated public keys skip the HS/asymmetric confusion guard — PyPI PyJWT <= 2.13.0 → 2.14.0

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Source page: https://erroneo.us/security/2026-09-29/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt