Google released Chrome 155 on 6 October with 247 security fixes, four of them critical. Twelve were reported by Xinyang Ge of Anthropic with Claude's help, two by OpenAI Codex Security. The bulletin says nothing about attacks in the wild.
- 6 October 2026: Chrome 155 reaches the stable channel with 247 security fixes, four of them rated Critical. The update rolls out over the coming days and weeks.
- Twelve fixes were reported by Xinyang Ge (Anthropic), "assisted by Claude", between 24 and 30 September: two critical and ten rated High. Two fixes rated High come from OpenAI Codex Security.
- For none of the 247 does Google say it is being used in attacks in the wild. Chrome updates itself, and the new version starts after a restart.
The thirtieth of September. Xinyang Ge of Anthropic reports a critical bug in Chrome, a use after free in the Track component, and in the bulletin the name is followed by "assisted by Claude". On 6 October the fix is in stable Chrome 155. Six days.
Twelve lines with the same signature in a bulletin of 247 fixes. All twelve are use after free, a bug where a program uses memory it has already released. Of the four critical fixes in this version, two have Claude next to the researcher's name, and one belongs to Google itself.
How much of the work is the human's and how much the model's, the bulletin does not say. It says "assisted by", meaning with the help of. Two more lines carry the name Xinyang Ge without Anthropic and Claude next to it, among them a third critical fix. We do not count those toward Claude, because Google does not mark them that way either.
The same list also has two fixes signed OpenAI Codex Security, in V8 and in HTML. Anthropic and OpenAI in one Google bulletin. The rest is more familiar: 185 of the fixes, close to three in every four, were reported by Google itself.
There is no urgency this time. For none of the 247 does Google say it is being used in attacks, and Chrome updates itself, as long as you restart it.
Whether it is a direction, one number will tell: how many lines with "assisted by" the next big Chrome bulletin carries, and they are easy to count.