- Description
- NGINX JavaScript has a vulnerability when the js_fetch_proxy directive is configured with at least one client-controlled NGINX variable (for example, $http_*, $arg_*, $cookie_*) and a location invoking the ngx.fetch() operation from NGINX JavaScript. An unauthenticated attacker can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
- Source
- f5sirt@f5.com
- NVD status
- Awaiting Analysis
CVSS 4.0
- Type
- Secondary
- Base score
- 9.2
- Impact score
- -
- Exploitability score
- -
- Vector string
- CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity
- CRITICAL
CVSS 3.1
- Type
- Secondary
- Base score
- 8.1
- Impact score
- 5.9
- Exploitability score
- 2.2
- Vector string
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity
- HIGH
- f5sirt@f5.com
- CWE-122
- Hype score
- Not currently trending
1/ lagi iseng googling nginx, eh malah nemuin berita ada 2 CVE critical baru 😅 CVE-2026-42945 (NGINX Rift) & CVE-2026-8711 keduanya CVSS 9.2 — alias critical langsung cek server production 🧵
@r00teen
21 May 2026
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NGINX njs の CVE-2026-8711（CVSS 9.2）を解説 同日公開の NGINX Rift（CVE-2026-42945）と比較すると影響範囲の違いが重要です。 ・影響は 3 条件が AND で揃った場合のみ ・修正版: njs 0.9.9 以降へ更新 ・NGINX Rift（PoC 公開・
@MyTechBlogJP
20 May 2026
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