Digest · Thursday
Security digest: June 25, 2026
2 known exploited (cisa kev) additions and 10 critical advisories.
All digests · RSS · Markdown
Take stock
- Do you run any of these? Cisco Unified Communications Manager, PTC Windchill and FlexPLM. They are being exploited in the wild (CISA KEV). Patch or mitigate if you do; CISA’s federal deadline is 2026-06-28.
- Go: 7 critical advisories (
golang.org/x/crypto). Check withgovulncheck ./.... - npm: 2 critical advisories (
i18next-http-middleware,i18next-fs-backend). Check withnpm audit (or: npm ls <package>). - PyPI: 1 critical advisory (
lemur). Check withpip-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) 2
Added to CISA’s catalog on this day: confirmed exploitation in the wild. Due date = CISA’s deadline for US federal agencies.
| CVE | Product and flaw | CISA due |
|---|---|---|
| CVE-2026-20230 | Cisco Unified Communications Manager Cisco Unified Communications Manager Server-Side Request Forgery (SSRF) Vulnerability | 2026-06-28 |
| CVE-2026-12569 | PTC Windchill and FlexPLM PTC Windchill and FlexPLM Improper Input Validation Vulnerability Ransomware | 2026-06-28 |
Critical advisories by ecosystem 10
GitHub-reviewed advisories rated critical, published this day (Pacific time).
Go 7
Check: govulncheck ./...
- golang.org/x/crypto: Invoking VerifiedPublicKeyCallback permissions skip enforcement CVE-2026-46595 CVSS 10.0 Critical
golang.org/x/crypto< 0.52.0 → fixed in 0.52.0 - golang.org/x/crypto: Invoking client can cause server deadlock on unexpected responses CVE-2026-39830 CVSS 9.1 Critical
golang.org/x/crypto< 0.52.0 → fixed in 0.52.0 - golang.org/x/crypto vulnerable to infinite loop on large channel writes CVE-2026-39834 CVSS 9.1 Critical
golang.org/x/crypto< 0.52.0 → fixed in 0.52.0 - golang.org/x/crypto doesn't enforce invoking key constraints CVE-2026-39833 CVSS 9.1 Critical
golang.org/x/crypto< 0.52.0 → fixed in 0.52.0 - golang.org/x/crypto doesn't drop invoking agent constraints when forwarding keys CVE-2026-39832 CVSS 9.1 Critical
golang.org/x/crypto< 0.52.0 → fixed in 0.52.0 - golang.org/x/crypto: FIDO/U2F security key physical presence check can be bypassed CVE-2026-39831 CVSS 9.1 Critical
golang.org/x/crypto< 0.52.0 → fixed in 0.52.0 - golang.org/x/crypto vulnerable to auth bypass via unenforced @revoked status CVE-2026-42508 CVSS 9.1 Critical
golang.org/x/crypto< 0.52.0 → fixed in 0.52.0
npm 2
Check: npm audit (or: npm ls <package>)
- i18next-http-middleware: MissingKeyHandler does not reject keys whose segments contain prototype-polluting names CVE-2026-48714 CVSS 9.1 Critical
i18next-http-middleware< 3.9.7 → fixed in 3.9.7 - i18next-fs-backend vulnerable to prototype pollution via crafted missing-key string CVE-2026-48713 CVSS 9.1 Critical
i18next-fs-backend< 2.6.6 → fixed in 2.6.6
PyPI 1
Check: pip-audit (or: pip show <package>)
- Lemur: ACME SSRF + creator-equality IDOR lead to AWS IAM/PKI compromise CVE-2026-55166 CVSS 9.9 Critical
lemur< 1.9.2 → fixed in 1.9.2