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Advisory record · GHSA-f67q-wr6w-23jq

Uncaught exception when transitioning the state of `AsyncGenerator` objects from within a property getter of `then`

CVSS 7.5 HighEPSS 0.0060 · 48th percentile

Published by the GitHub Advisory Database at 14 Aug 2024, 12:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
boa_enginecrates.io>=0.16.0, <0.19.00.19.0
Identifiers
GHSA-f67q-wr6w-23jq · CVE-2024-43367 · RUSTSEC-2024-0444
Weakness (CWE)
CWE-248
Tags
Published
14 Aug 2024
Updated
12 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Boa (crates.io package boa_engine) versions 0.16.0 up to but not including 0.19.0 are vulnerable. A remote attacker who can get the application to run crafted ECMAScript code, such as from an external user, can trigger an uncaught exception by changing the state of an AsyncGenerator from a getter on the promise's then property, which can cause a denial of service. Upgrade to boa_engine 0.19.0 or later. Users who cannot upgrade can wrap engine calls in std::panic::catch_unwind to keep the main application running.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0060, the 48th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:24 UTC First seen by agentprime
  2. 31 Oct 2026, 14:24 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.