CVE•Published 2026-09-25•Modified 2026-10-23•0 articles on news•6 live references•NVD data

CVE-2026-91769Php · Php

Vulnerability data via NVD (ingested)

CVSS v3.1

4.3

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS percentile

Exploit Prediction Scoring System · top 97% of all CVEs

Weaknesses (CWE)

CWE-297Improper Validation of Certificate with Host Mismatch

Description

PHP's OpenSSL stream peer verification checks the certificate's subjectAltName entries first and, whenever no entry matches, falls back to the Common Name. RFC 6125 requires the CN to be ignored once the certificate presents any service identity, so a certificate carrying a non-matching DNS SAN was still accepted when its CN matched the requested peer_name. A certificate trusted by the client for one name can therefore be used to impersonate another.

Timeline

Published 2026-09-25

Modified 2026-10-23

External references

NVD MITRE Exploit-DB GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag3,190 hosts

vuln:CVE-2026-91769

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Php Php"

All exposed Php Php instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Php"

HTTP body or banner mentions "Php" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-91769