CVE-2024-8926: PHP-CGI cgi.force_redirect bypass on non-standard code pages (incomplete CVE-2024-4577 fix)

high Affects PHP engine. Feed 2026.10.29.1, updated 2026-10-28; published 2024-10-24.

PHP-CGI cgi.force_redirect bypass on non-standard code pages (incomplete CVE-2024-4577 fix)

Package: PHP engine PHP engine
Affected branches: 8.1 → fixed in 8.1.30; 8.2 → fixed in 8.2.24; 8.3 → fixed in 8.3.12
Severity: high CVSS 7.5
Exploitation: not on CISA KEV · EPSS 4% (89.6th percentile)
Remediation: Upgrade to 8.3.12 / 8.2.24 / 8.1.30.
Published: 2024-10-24

References

Am I affected?

Find out in one command. phpwarden checks this host's PHP build against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden scan

Running a fleet? Aggregate hosts into one report.

Install docs How findings are ranked

Related advisories

CVE-2026-109618 KEV critical Upload-progress use-after-free and remote process-memory disclosure same package: PHP engine
CVE-2026-109619 KEV critical Fatal-error backtrace use-after-free and OPcache type confusion same package: PHP engine
CVE-2024-4577 KEV critical PHP-CGI argument injection to RCE on Windows via Best-Fit encoding same package: PHP engine
CVE-2019-11043 KEV critical PHP-FPM remote code execution via env_path_info buffer underflow same package: PHP engine
CVE-2023-3824 critical Stack buffer overflow / RCE when loading a crafted PHAR archive same package: PHP engine
CVE-2024-11236 critical Integer overflow causing out-of-bounds write in DB quoters / ldap_escape same package: PHP engine