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GHSA-62ch-8vmq-8xm7

HighCVSS 8.2 / 10
Published Oct 2, 2026·Last modified Oct 2, 2026
Affected Components(1)
npm logofiglet
< 1.11.3
Description

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.

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Risk Scores
Base Score
8.2

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence
4.6

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
0.40%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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