High 8.2Published Jul 10, 2026

CVE-2026-54736Phalcon: Non-constant-time HMAC verification in `Encryption\Crypt::decrypt` (timing side-channel)

Updated under an hour ago (Oct 27, 2026, 10:10 PM ET)

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It affects phalcon cphalcon. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for phalcon cphalcon

Exploited in the last 30 days

Phalcon is a high-performance, full-stack PHP framework. Prior to 5.14.1, Phalcon\Encryption\Crypt::decrypt compares the attacker-supplied HMAC tag against the freshly computed HMAC using PHP/Zephir identity comparison, which lowers to a byte-wise comparison that returns early on the first differing byte. This observable timing discrepancy can allow an attacker to recover a valid tag byte-by-byte and attach it to a chosen IV and ciphertext so that decrypt() accepts tampered encrypted content as authentic. This issue is fixed in version 5.14.1.

CVSS: 8.2 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-208, CWE-347
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 13, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

phalcon cphalcon phalcon:cphalcon (from the name)	before 5.14.1	CNA record

References

References

https://github.com/phalcon/cphalcon/security/advisories/GHSA-8jqh-95g6-7jpj	x-refsource-confirm
https://github.com/phalcon/cphalcon/issues/17090	x-refsource-misc
https://github.com/phalcon/cphalcon/pull/17091	x-refsource-misc
https://github.com/phalcon/cphalcon/commit/ad53ab1b2e7ec59b3af92b0b37b8aaa099011137	x-refsource-misc
https://github.com/phalcon/cphalcon/releases/tag/v5.14.1	x-refsource-misc

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.