Mozilla has updated Firefox to patch 14 vulnerabilities, three of them critical, but pushed out the new versions without fixing several flaws.
Firefox 126.96.36.199 and Firefox 188.8.131.52, which originally were to release on Wednesday, were delayed to patch a series of bugs, including some disclosed this month by Polish researcher Michal Zelewski. Two others forwarded to Mozilla developers by Zelewski, however, didn't make it into Friday's updates.
"Neither of those will make this release," said Daniel Veditz, of the Mozilla security in an email. "It is important that we get the security fixes we have into the hands of our users."
Of the bugs filed by Zelewski but not fixed in the updates, the most serious is a memory corruption flaw that could let attackers inject code remotely into Firefox-equipped machines simply by duping users into visiting a malicious Web page. "Firefox is susceptible to a seemingly pretty nasty, and apparently easily exploitable, memory corruption vulnerability," wrote Zelewski in the Bugzilla database.
Also unrepaired in the latest browser versions is a third Zelewski-discovered bug that could give cybercriminals a leg up when running phishing attacks.
Mozilla spelled out the security fixes in Firefox 184.108.40.206 and 220.127.116.11 here.
Firefox 18.104.22.168 is nearly at the end of its supported lifespan. After April 24, Mozilla will stop issuing security and stability updates to that edition.
Firefox 22.214.171.124 can be downloaded from the Mozilla website in versions for Windows, Mac OS X and Linux in 36 languages. Users can also update current editions with the Check for Updates command in the Help menu.