Oh yeah.

Or poison ivy.

AFAIK, poison ivy isn't found in California.

Either way it's bad news. don't touch and don't burn. I use to use the long newspaper bags turned inside-out over my gloved hand; then grab the plant and slide the plastic right down over it and pull; toss the bag in the trash,.. not the green bin.

Depending where it is, of course. Poison oak is a valuable native shrub for birds and pollinators. Plus it keeps out the riffraff. If it’s in some wild-ish area, you could leave it. If it’s in a standard development with lots of houses, yank it.

And while native and can't be called invasive (technically), it sure does spread.

Jepson page on the plant:

http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=46791