CNet is writing about some 0day vulnerabilities in Firefox that were demonstrated at ToorCon '06 by Mischa Spiegelmock and Andrew Wbeelsoi: http://news.zdnet.com/2100-1009_22-6121608.html Mischa and Andrew also claim to have found about 30 0day vulnerabilities in Firefox. The article mention that the vulnerabilities from the presentation are specific to Firefox's implementation of Javascript and hints that they are stack overflows. On the other hand, the recent security-related Mozilla commits following the presentation deal with improper validation of scope chain lookups in jsxml.c, jsinterp.c and jsiter.c, which could allow injecting content into the Chrome context. We'll probably see a security release of Firefox in the next week, but in the mean time I have put a couple of links to the code diff's that fix these vulnerabilities at http://blogs.securiteam.com/index.php/archives/657 -- Thor Larholm