Medium 5.0Published May 2, 2005

CVE-2005-0366The integrity check feature in OpenPGP, when handling a message that was encrypted using cipher feedback (CFB) mode, allows remote attackers to recover part of the plaintext via a chosen-ciphertext a…

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

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The integrity check feature in OpenPGP, when handling a message that was encrypted using cipher feedback (CFB) mode, allows remote attackers to recover part of the plaintext via a chosen-ciphertext attack when the first 2 bytes of a message block are known, and an oracle or other mechanism is available to determine whether an integrity check failed.

CVSS: 5.0 MEDIUM (v2.0, NVD)AV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness (CWE): CWE-326
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

gnupg gnupg gnupg:gnupg	before 1.4.1	NVD

References

References

http://eprint.iacr.org/2005/033	third-party-advisory
http://eprint.iacr.org/2005/033.pdf	technical-description, third-party-advisory
http://securitytracker.com/id?1013166	third-party-advisory, vdb-entry
http://www.gentoo.org/security/en/glsa/glsa-200503-29.xml	third-party-advisory
http://www.kb.cert.org/vuls/id/303094	third-party-advisory, us-government-resource
http://www.mandriva.com/security/advisories?name=MDKSA-2005:057	broken-link
http://www.novell.com/linux/security/advisories/2005_07_sr.html	broken-link
http://www.osvdb.org/13775	broken-link
http://www.pgp.com/library/ctocorner/openpgp.html	broken-link
http://www.securityfocus.com/bid/12529	third-party-advisory, vdb-entry

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.