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 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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://metacpan.org/release/GETTY/Crypt-Age-0.004/changes
http://www.openwall.com/lists/oss-security/2026/10/20/39

Configurations

No configuration.

History

30 Oct 2026, 13:20

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

21 Oct 2026, 01:17

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/10/20/39 -

20 Oct 2026, 22:20

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-20 22:20

Updated : 2026-10-30 13:20

NVD link : CVE-2026-85783

Mitre link : CVE-2026-85783

CVE.ORG link : CVE-2026-85783

JSON object : View

Products Affected

No product.

CWE

CWE-405

Asymmetric Resource Consumption (Amplification)

CWE-770

Allocation of Resources Without Limits or Throttling

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