CVE-2024-39702

In lj_str_hash.c in OpenResty 1.19.3.1 through 1.25.3.1, the string hashing function (used during string interning) allows HashDoS (Hash Denial of Service) attacks. An attacker could cause excessive resource usage during proxy operations via crafted requests, potentially leading to a denial of service with relatively few incoming requests. This vulnerability only exists in the OpenResty fork in the openresty/luajit2 GitHub repository. The LuaJIT/LuaJIT repository. is unaffected.

Published: 2024-07-23 Last update: 2025-09-24 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-39702 is rated Low Risk (38.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.56%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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

Exploit prediction scoring system (EPSS) score for CVE-2024-39702

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 2026-06-15 0.51% 0.56% +0.05%
2 2026-05-22 0.78% 0.51% -0.27%
3 2026-05-17 — 0.78% —

Full EPSS history (48 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-39702

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2024-39702

OS Trackers for CVE-2024-39702

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2024-39702

Affected software / configurations for CVE-2024-39702

Vendor Product Version Raw CPE
openresty openresty >= 1.19.3.1, < 1.19.9.2 cpe:2.3:a:openresty:openresty:*:*:*:*:*:*:*:*
openresty openresty >= 1.21.4.1, < 1.21.4.4 cpe:2.3:a:openresty:openresty:*:*:*:*:*:*:*:*
openresty openresty 1.25.3.1 cpe:2.3:a:openresty:openresty:1.25.3.1:*:*:*:*:*:*:*

References for CVE-2024-39702

cvelogic Threat Intelligence