CVSS 3.1
8.1 highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:NHigh (8.1) in google chrome. EPSS 0.2% estimated probability of exploitation activity in the next 30 days.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:NExplain CVE-2026-126903 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-126903?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-126903?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-126903 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Google Chrome | from 157.0.8103.78 before 157.0.8103.78 |
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Debian | 12, 13, 14 | chromium | no fix listed | DEBIAN-CVE-2026-126903 |
From the distributions' data via OSV.dev: the Debian Security Tracker. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Debian.
Red Hat rates this Important.
Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory.
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | firefox | Not affected | |
| Red Hat Enterprise Linux 10 | thunderbird | Not affected | |
| Red Hat Enterprise Linux 6 | webkitgtk | Out of support scope | |
| Red Hat Enterprise Linux 7 | firefox | Not affected | |
| Red Hat Enterprise Linux 7 | webkitgtk3 | Out of support scope | |
| Red Hat Enterprise Linux 7 | webkitgtk4 | Affected | |
| Red Hat Enterprise Linux 8 | firefox | Not affected | |
| Red Hat Enterprise Linux 8 | mozjs60 | Not affected | |
| Red Hat Enterprise Linux 8 | thunderbird | Not affected | |
| Red Hat Enterprise Linux 8 | webkit2gtk3 | Affected | |
| Red Hat Enterprise Linux 9 | firefox | Not affected | |
| Red Hat Enterprise Linux 9 | thunderbird | Not affected | |
| Red Hat Enterprise Linux 9 | webkit2gtk3 | Affected |
Contains Red Hat Security Data © Red Hat, Inc., licensed under CC BY 4.0. Source: https://access.redhat.com/security/data. Modified: reformatted. Red Hat's page for CVE-2026-126903.
Changes since this site first stored the record. The same for every record: /api/public/changes.