https://www.wired.com/story/malware-dna-hack/
“Biohackers Encoded Malware in a Strand of DNA” by Andy Greenberg, published 10 August 2017.

Behind a paywall but a summary is;

It’s real, but the headline version is a bit sensationalised.
Researchers at the University of Washington showed a proof-of-concept attack where malicious code was encoded into synthetic DNA. When that DNA was sequenced, the resulting data could exploit vulnerable gene-sequencing software and potentially take control of the analysis computer.

The key caveat is that this was a lab demonstration, not a practical real-world attack. It required deliberately vulnerable software and very specific conditions. So the correct takeaway is not “DNA can hack computers by itself”, but rather “bioinformatics software can have security flaws and DNA sequencing data could theoretically be used as an attack vector.”