Does producing such a grave bug like Log4Shell make you effectively unemployable?
The people involved have committed under their real names and, taking into account how prominent the bug is, it's easy to assume that every potential employer googling for a candidate's name will learn that they were involved in this incident.
Can such an error be forgiven and, if so, under which circumstances? I'd expect that making a grave error as junior isn't a no-go because juniors are expected to make errors. However, employers wouldn't expect seniors to make the same mistakes.
For non-IT people: This introduced a critical security vulnerability to log4j2:
Affected commercial services include Amazon Web Services, Cloudflare, iCloud, Minecraft: Java Edition, Steam, Tencent QQ and many others. According to Wiz and EY, the vulnerability affected 93% of enterprise cloud environments.
The exploit allows hackers to gain control of vulnerable devices using Java. Some hackers employ the vulnerability to utilize the capabilities of the victims' devices; uses included cryptocurrency mining, creating botnets, sending spam, establishing backdoors and other illegal activities such as ransomware attacks.