CVE-2024-8926 | PHP CGI Parameter Injection Vulnerability (CVE-2024-4577 bypass)

Exp

In PHP versions 8.1.* before 8.1.30, 8.2.* before 8.2.24, 8.3.* before 8.3.12, when using a certain non-standard configurations of Windows codepages, the fixes for  CVE-2024-4577 https://github.com/advisories/GHSA-vxpp-6299-mxw3  may still be bypassed and the same command injection related to Windows "Best Fit" codepage behavior can be achieved. This may allow a malicious user to pass options to PHP binary being run, and thus reveal the source code of scripts, run arbitrary PHP code on the server, etc.

Published: 2024-10-08 Last update: 2025-11-03 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-8926 is rated High Exploit Risk (77.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.71%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2024-8926

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2024-8926

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-17 3.01% 2.71% -0.30%
2 2026-02-27 2.24% 3.01% +0.77%
3 2026-02-01 — 2.24% —

Full EPSS history (33 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-8926

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 [email protected]
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]

Weakness enumeration for CVE-2024-8926

OS Trackers for CVE-2024-8926

vendor priority summary link
alpine high CVE-2024-8926: 2 source package rows (php82, php83); 2 state rows across 1 repos (3.20-community); fixed 2, open 0. https://security.alpinelinux.org/vuln/CVE-2024-8926
debian unimportant CVE-2024-8926 unimportant priority: Debian including 2 source packages (php7.4, php8.2), 2 status rows across 2 suites (bookworm, bullseye): resolved 2. https://security-tracker.debian.org/tracker/CVE-2024-8926
redhat high — https://access.redhat.com/security/cve/CVE-2024-8926
suse high CVE-2024-8926 severity important: SUSE including 320 source package names (apache2-mod_php5, apache2-mod_php7, …), 1457 product×package rows across 25 product lines (SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS, SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS, … (25 product lines)): Known Not Affected 1404, Fixed 53. https://www.suse.com/security/cve/CVE-2024-8926/
ubuntu medium CVE-2024-8926 medium priority: Ubuntu including 6 source packages (php5, php7.0, php7.2, php7.4, php8.1, php8.3), 27 status rows across 7 suites (bionic, focal, jammy, noble, trusty, upstream, xenial): DNE 15, not-affected 6, needs-triage 4, released 2. https://ubuntu.com/security/CVE-2024-8926

Affected software / configurations for CVE-2024-8926

Vendor Product Version Raw CPE
php php >= 8.1.0, < 8.1.30 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php >= 8.2.0, < 8.2.24 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php >= 8.3.0, < 8.3.12 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*

References for CVE-2024-8926

cvelogic Threat Intelligence