CVE-2025-6558 — Chrome
HIGHCVE-2025-6558 is a high-severity (CVSS 8.8) Improper Input Validation vulnerability. It is in CISA's Known Exploited Vulnerabilities catalog (added 2025-07-22) — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.
Exploitation Status
Actively exploited in the wild
- Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2025-07-22. Federal agencies were required to remediate by 2025-08-12.
- A successful exploit gives an attacker total control of the affected component, not partial access.
Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2025-6558.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2025-6558 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 395,249 CVEs with a current EPSS score, this one falls in the 10–50% band (highlighted). Counts from FIRST.org, log-scaled.
Description
Insufficient validation of untrusted input in ANGLE and GPU in Google Chrome prior to 138.0.7204.157 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
Affected Products
ipadosappleiphone osapplemacosapplesafariapplevisionosapplewatchosappleResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
VulnerabilityDetect
Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).
Remediation status
No fixed release is recorded for CVE-2025-6558 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
To exploit this flaw, an attacker needs to trick a user into visiting a malicious website.
Do not visit untrusted websites. Also, do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these…Source: Red Hat security advisory for CVE-2025-6558 (CC BY 4.0)
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Enterprise Linux 7 Extended Lifecycle Support | webkitgtk4-0:2.48.5-1.el7_9 | RHSA-2025:15729 |
| Red Hat Enterprise Linux 8 | webkit2gtk3-0:2.48.5-1.el8_10 | RHSA-2025:13780 |
| Red Hat Enterprise Linux 8.2 Advanced Update Support | webkit2gtk3-0:2.48.5-1.el8_2 | RHSA-2025:14432 |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | webkit2gtk3-0:2.48.5-1.el8_4 | RHSA-2025:14486 |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | webkit2gtk3-0:2.48.5-1.el8_6 | RHSA-2025:14433 |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Service | webkit2gtk3-0:2.48.5-1.el8_8 | RHSA-2025:14434 |
| Red Hat Enterprise Linux 9 | webkit2gtk3-0:2.48.5-1.el9_6 | RHSA-2025:13782 |
| Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | webkit2gtk3-0:2.48.5-1.el9_0 | RHSA-2025:14422 |
Frequently Asked Questions
Is CVE-2025-6558 in your dependencies?
Find it across , including transitive dependencies.