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build(deps): bump next to 15.5.18 and patch vulnerable transitives#67

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unnawut merged 1 commit into
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unnawut:deps/security-bump-next-15.5.18
May 19, 2026
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build(deps): bump next to 15.5.18 and patch vulnerable transitives#67
unnawut merged 1 commit into
ReamLabs:masterfrom
unnawut:deps/security-bump-next-15.5.18

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@unnawut unnawut commented May 19, 2026

Resolves all 31 open Dependabot alerts in one go:

  • next 15.5.10 -> 15.5.18 (closes 22 alerts: SSRF via WebSocket upgrades, middleware/proxy bypass in i18n/App Router/dynamic routes, DoS in Image Optimization & Server Components, XSS in beforeInteractive scripts, RSC + middleware cache poisoning, HTTP request smuggling, unbounded image disk cache)
  • postcss devDep ^8 -> ^8.5.10 (XSS via unescaped </style>)
  • overrides for transitive deps:
    • lodash ^4.18.0 (prototype pollution, code injection via _.template)
    • picomatch ^2.3.2 (ReDoS, method injection)
    • brace-expansion ^2.0.3 (process hang / memory exhaustion)
    • yaml ^2.8.3 (stack overflow on deeply nested collections)

Verified npm audit reports 0 vulnerabilities, production build and dev server boot cleanly on Next.js 15.5.18. Cross-checked the post- upgrade lockfile against known-compromised versions from the Sept 2025 chalk/debug account-takeover and Shai-Hulud worm waves — none of the tainted versions are present.

Resolves all 31 open Dependabot alerts in one go:

- next 15.5.10 -> 15.5.18 (closes 22 alerts: SSRF via WebSocket
  upgrades, middleware/proxy bypass in i18n/App Router/dynamic routes,
  DoS in Image Optimization & Server Components, XSS in
  beforeInteractive scripts, RSC + middleware cache poisoning, HTTP
  request smuggling, unbounded image disk cache)
- postcss devDep ^8 -> ^8.5.10 (XSS via unescaped </style>)
- overrides for transitive deps:
  - lodash ^4.18.0 (prototype pollution, code injection via _.template)
  - picomatch ^2.3.2 (ReDoS, method injection)
  - brace-expansion ^2.0.3 (process hang / memory exhaustion)
  - yaml ^2.8.3 (stack overflow on deeply nested collections)

Verified npm audit reports 0 vulnerabilities, production build and
dev server boot cleanly on Next.js 15.5.18. Cross-checked the post-
upgrade lockfile against known-compromised versions from the Sept 2025
chalk/debug account-takeover and Shai-Hulud worm waves — none of the
tainted versions are present.
@unnawut unnawut merged commit 8b5bbb4 into ReamLabs:master May 19, 2026
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@unnawut unnawut deleted the deps/security-bump-next-15.5.18 branch May 19, 2026 08:18
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