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Add Bleichenbacher attack warning about PKCS#1 v1.5 - #637
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Notes the long history of repeat attacks, and how the `rsa` crate is still vulnerable to the Marvin Attack.
takumi-earth
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Jan 27, 2026
Notes the long history of repeat attacks, and how the `rsa` crate is still vulnerable to the Marvin Attack.
tarcieri
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Oct 18, 2026
PKCS#1 v1.5 encryption is fundamentally broken (see #637) due to Bleichenbacher attacks, and `draft-irtf-cfrg-rsa-guidance` suggests we get rid of it entirely. At the very least, we can stop using it in the README.md example
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Notes the long history of repeat attacks, and how the
rsacrate is still vulnerable to the Marvin Attack.Screenshots
Note: these appear even more prominently on https://docs.rs