GHSA-v49m-r4w3-2p5x

GHSA-v49m-r4w3-2p5x PUBLISHED CVSS 9.800000190734863 CRITICAL

Record from GitHub Advisory Database · Published February 24, 2026

Integer overflow in the JavaScript: Standard Library component. This vulnerability affects Firefox < 148 and Firefox ESR < 140.8.

Fixed versions

Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.

Package	Ecosystem	Fixed in
firefox	Chainguard	140.8.0-r0
firefox-esr	Chainguard	140.8.0-r0
firefox	Wolfi	140.8.0-r0

Risk scores

CVSS 3.1

9.800000190734863

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Vendor	Product	Versions
chainguard	firefox	0
chainguard	firefox-esr	0
wolfi	firefox	0

Timeline

Feb 24, 2026 CVE Published
Apr 10, 2026 Security Advisory
Aug 6, 2026 Distribution Patch (25 in total, the first dated here)

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln GHSA-v49m-r4w3-2p5x
vulnetix vdb fixes GHSA-v49m-r4w3-2p5x

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/GHSA-v49m-r4w3-2p5x/fixes/registry"

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References

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