CVE-2026-96780

About vulnerability

Impact

A denial-of-service (infinite loop) can occur in text() / textSync() when both:

• whitespaceBreak: true is set, and
• width is set smaller than the rendered width of a single FIGlet character. Under these conditions breakWord() could never find a valid break point, so the word-wrapping loop in generateFigTextLines() never terminated. This pins a CPU core and grows memory without bound, blocking the Node.js event loop.

Severity

Low or Medium. Triggering requires a non-default configuration (whitespaceBreak: true) and an attacker-controlled width value reaching text()/textSync(). This library is typically used with fixed options, where this is not reachable. Applications that pass an untrusted width together with whitespaceBreak on a request path are affected.

Patches

Fixed in figlet 1.11.3. breakWord() now always makes forward progress (emitting an over-wide character on its own line), and FIGlet header parsing now rejects invalid values (e.g. zero/negative height).

Workarounds

Do not expose width to untrusted input, or leave whitespaceBreak disabled (the default), or upgrade to 1.11.3.

Affected product:

appkit , figlet , reown-appkit , reown-appkit-adapter-bitcoin , reown-appkit-adapter-ethers , reown-appkit-adapter-ethers5 , reown-appkit-adapter-solana , reown-appkit-adapter-wagmi , reown-appkit-common , reown-appkit-controllers , reown-appkit-core , reown-appkit-experimental , reown-appkit-pay , reown-appkit-scaffold-ui , reown-appkit-siwe , reown-appkit-siwx , reown-appkit-ui , reown-appkit-universal-connector , reown-appkit-utils , reown-appkit-wallet , reown-appkit-wallet-button

Affected packages:

figlet @ 1.11.0 (+422 more)