Bump hono from 4.12.4 to 4.12.18 in /backend/src/mithrandir

[dependabot]

Bumps hono from 4.12.4 to 4.12.18.

Release notes

Sourced from hono's releases.

v4.12.18

Security fixes

This release includes fixes for the following security issues:

Cache Middleware ignores Vary: Authorization / Vary: Cookie leading to cross-user cache leakage

Affects: Cache Middleware. Fixes missing cache-skip handling for Vary: Authorization and Vary: Cookie, where a response cached for one authenticated user could be served to other users. GHSA-p77w-8qqv-26rm

CSS Declaration Injection via Style Object Values in JSX SSR

Affects: hono/jsx. Fixes a missing CSS-context escape for style object values and property names, where untrusted input could inject additional CSS declarations. The impact is limited to CSS and does not allow JavaScript execution. GHSA-qp7p-654g-cw7p

Improper validation of NumericDate claims (exp, nbf, iat) in JWT verify()

Affects: hono/utils/jwt. Fixes improper validation of exp, nbf, and iat claims, where falsy, non-finite, or non-numeric values could silently bypass time-based checks instead of being rejected per RFC 7519. GHSA-hm8q-7f3q-5f36

---

Users who use the JWT helper, hono/jsx, or the Cache middleware are strongly encouraged to upgrade to this version.

v4.12.17

What's Changed

• fix(jsx): normalize SVG attributes on the root element by @​kfly8 in honojs/hono#4893
• fix(ssg): add atom+xml and rss+xml to defaultExtensionMap by @​yuintei in honojs/hono#4899
• fix(cors): make origin optional in CORSOptions by @​truffle-dev in honojs/hono#4905
• fix(types): propagate middleware response types to app.on overloads by @​T4ko0522 in honojs/hono#4906

New Contributors

• @​kfly8 made their first contribution in honojs/hono#4893
• @​truffle-dev made their first contribution in honojs/hono#4905

Full Changelog: honojs/hono@v4.12.16...v4.12.17

v4.12.16

Security fixes

This release includes fixes for the following security issues:

Unvalidated JSX Tag Names in hono/jsx May Allow HTML Injection

Affects: hono/jsx. Fixes missing validation of JSX tag names when using jsx() or createElement(), which could allow HTML injection if untrusted input is used as the tag name. GHSA-69xw-7hcm-h432

bodyLimit() can be bypassed for chunked / unknown-length requests

Affects: Body Limit Middleware. Fixes late enforcement for request bodies without a reliable Content-Length (e.g. chunked requests), where oversized requests could reach handlers and return successful responses before being rejected. GHSA-9vqf-7f2p-gf9v

v4.12.15

What's Changed

• fix(jwt): support single-line PEM keys by @​hiendv in honojs/hono#4889

... (truncated)

Commits

• f10dee8 4.12.18
• a5bd9eb Merge commit from fork
• 58d3d3a Merge commit from fork
• 568c2ec Merge commit from fork
• ff2b3d3 4.12.17
• 52aaaf9 fix(types): propagate middleware response types to app.on overloads (#4906)
• 76d5589 fix(cors): make origin optional in CORSOptions (#4905)
• 8f027e5 fix(ssg): add atom+xml and rss+xml to defaultExtensionMap (#4899)
• bfba97c fix(jsx): normalize SVG attributes on the <svg> root element (#4893)
• 90d4182 4.12.16
• Additional commits viewable in compare view

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[claude]

LGTM — patch-version Dependabot bump within 4.12.x; the affected modules (Cache middleware, JSX, JWT helper, bodyLimit) aren't used in this lambda.

Extended reasoning...

Overview

Dependabot bump of hono from 4.12.4 to 4.12.18 in backend/src/mithrandir, touching only package.json and package-lock.json. No application code changes.

Security risks

None introduced — this is in fact a security-positive update. The release notes call out fixes for cache middleware cross-user leakage, JSX HTML/CSS injection, JWT NumericDate validation, and bodyLimit bypass. Inspecting backend/src/mithrandir/index.ts confirms the lambda only imports Hono, hono/aws-lambda, and hono/http-exception, so none of the affected modules are exercised. There is still net-positive defense-in-depth value in taking the patch.

Level of scrutiny

Low. This is a same-major, same-minor patch bump from a trusted source (Dependabot security update) with no API changes in the modules used. The diff is mechanical and the package-lock changes are limited to the hono entry.

Other factors

No bugs were flagged by the bug hunting system. No prior reviewer comments. Compatibility score is provided by Dependabot. Safe to shadow-approve.

[dependabot]

Superseded by #1121.