CVE Catalog

CVE-2026-85783

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.22%

12th percentile - higher than 12% of all known CVEs

Summary

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. Each stanza is 98 bytes of attacker-chosen header, and the file is rejected only after every attempt has run.

Risk Assessment

An attacker can supply a crafted file causing CPU resource exhaustion and denial of service whenever a caller decrypts a file it did not write.

Recommendation

Update Crypt::Age to version 0.004 or later and limit processing of untrusted encrypted files.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS