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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Google’s Chrome 154 and Mozilla’s Firefox 157 updates, announced September 29, 2026, address more than 100 security issues combined, according to SecurityWeek’s September 30 report. Update the browser you use promptly and confirm the installation has finished. The counts combine two vendors’ releases; they are not a measure of which browser is safer overall.
Which browser updates address the flaws?
| Browser and channel | Fixed release reported | What the release addresses |
|---|---|---|
| Google Chrome | 154.0.8037.92/.93 for Windows and macOS; 154.0.8037.92 for Linux, as reported by SecurityWeek | 32 security defects, including a critical ANGLE buffer overflow, CVE-2026-102331, and 25 high-severity weaknesses. Five of those high-severity issues were type-confusion flaws in V8. |
| Mozilla Firefox, standard release | 157, identified by Mozilla in MFSA 2026-97 | Mozilla rates the advisory’s overall impact high and lists individual bugs affecting areas including memory safety, sandboxing, WebGPU, WebAssembly, networking, and browser components. |
| Mozilla Firefox ESR | 153.4, 140.17, and 115.42, listed by SecurityWeek as also receiving many of the fixes | Check Mozilla’s advisory index and your installed ESR channel for the applicable update. |
The Chrome versions and defect totals in the table are SecurityWeek’s reporting; Google’s release page was not available in the cited coverage for independent confirmation. Chrome updates can roll out at different times by platform, so the listed release does not mean every device has already received it.
How many vulnerabilities were reported?
SecurityWeek counted 32 Chrome defects and approximately 76 Firefox vulnerabilities—more than 100 combined. It summarized 25 Chrome issues as high severity and counted 38 high-severity Firefox defects. The Firefox totals are SecurityWeek’s count, not a total stated in Mozilla’s advisory; Mozilla confirms Firefox 157 and enumerates bugs, while assigning impact labels to individual entries.
Counts across browser releases are not directly comparable measures of security. The updates cover different products and advisories, and Mozilla says its memory-safety reporting approach has changed: “We no longer roll all internally identified memory safety vulnerabilities into a single CVE and are now issuing an advisory for every individual bug.” That affects comparisons with older Mozilla disclosures.
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What kinds of security issues were fixed?
Chrome: ANGLE and V8
SecurityWeek singled out a critical-severity buffer overflow in ANGLE, tracked as CVE-2026-102331. It also reported five high-severity type-confusion flaws in V8, Chrome’s JavaScript and WebAssembly engine. The reported 25 high-severity weaknesses include those V8 issues.
Firefox: memory safety and browser protections
Mozilla’s Firefox 157 advisory includes bugs involving use-after-free, sandbox escapes, privilege escalation, uninitialized memory, and incorrect boundary conditions, among other issues. The advisory’s overall impact rating is high, but not every listed bug has a high individual impact rating; some entries are marked moderate or low.
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Were the vulnerabilities exploited in the wild?
SecurityWeek reported that Google and Mozilla did not mention exploitation of the listed flaws in the reports it covered. That means exploitation was not disclosed in those reports; it does not establish that exploitation was impossible or rule out undisclosed activity.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to update Chrome or Firefox
Use the browser’s built-in updater, then restart if prompted. Menu wording can differ slightly by operating system or release.
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Update Chrome
- Open Chrome and select the three-dot menu.
- Choose Help > About Google Chrome. Chrome checks for updates on this page.
- If an update is available, let it download and select Relaunch when offered. Save work in open tabs first; restarting closes and reopens the browser.
- Return to About Google Chrome and verify that Chrome reports it is up to date. If your device has not received the release yet, check again later.
Update Firefox
- Open Firefox and select the menu button.
- Choose Help > About Firefox. Firefox checks for and downloads available updates.
- Select Restart to update Firefox when it appears, then confirm the browser has reopened on the updated release.
If you use Firefox ESR, follow the update offered for that installation channel rather than switching to the standard Firefox release based only on its version number. Mozilla’s advisory index lists current notices, while availability can depend on platform and channel.
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- TRUSTED PASSKEY TECHNOLOGY: Uses the latest passkey standards (FIDO2/WebAuthn & FIDO U2F) but does not support One-Time Passwords. For complex needs, check out the YubiKey 5 Series.
- BUILT TO LAST: Made from tough, waterproof, and crush-resistant materials. Manufactured in Sweden and programmed in the USA with the highest security standards.
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