CVE-2026-85783 Crypt::Age versions before 0.004 for Perl allow CPU exhaustion via an unbounded number of recipient stanzas, each costing an X25519 scalar m
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-85783?
CVE-2026-85783 is a vulnerability, published on 20 Oct 2026.
Official description
Crypt::Age versions before 0.004 for Perl allow CPU exhaustion via an unbounded number of recipient stanzas, each costing an X25519 scalar multiplication in unwrap_file_key.
The header parser accepts any number of recipient stanzas, and unwrap_file_key tries every identity against every X25519 stanza. Each attempt runs a scalar multiplication, an HKDF and a ChaCha20-Poly1305 open. The header MAC cannot be checked first, because its key comes from the file key, which only a successful unwrap produces.
Each stanza is 98 bytes of attacker-chosen header and buys one scalar multiplication per identity held, and the file is rejected only after every one of them has run. A caller reaches this through decrypt, decrypt_file or decrypt_filehandle whenever it decrypts a file it did not write.
Which versions are affected by CVE-2026-85783?
How do I fix CVE-2026-85783?
No fix has been published for CVE-2026-85783 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-85783 being exploited?
There is no known exploitation of CVE-2026-85783 in the wild and no public exploit code.
Sources
Also known as GHSA-rvhp-9hpj-rh7c.