CVE-2022-43286
CVE-2022-43286 is a critical-severity vulnerability in F5 Njs with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- EPSS exploit prediction: 1% (55th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-416
- Affected product: F5 Njs
- Published:
- Last modified:
Description
Nginx NJS v0.7.2 was discovered to contain a heap-use-after-free bug caused by illegal memory copy in the function njs_json_parse_iterator_call at njs_json.c.
Frequently asked questions
- What is CVE-2022-43286?
- Nginx NJS v0.7.2 was discovered to contain a heap-use-after-free bug caused by illegal memory copy in the function njs_json_parse_iterator_call at njs_json.c.
- How severe is CVE-2022-43286?
- CVE-2022-43286 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2022-43286 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2022-43286?
- CVE-2022-43286 affects F5 Njs. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2022-43286?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2022-43286 published?
- CVE-2022-43286 was published on 2022-10-28 and last updated on 2026-06-17.
References
- https://github.com/nginx/njs/commit/2ad0ea24a58d570634e09c2e58c3b314505eaa6a
- https://github.com/nginx/njs/issues/480
Affected products (1)
- cpe:2.3:a:f5:njs:0.7.2:*:*:*:*:*:*:*
More vulnerabilities in F5 Njs
- CVE-2020-19695 — Critical (CVSS 9.8): Buffer Overflow found in Nginx NJS allows a remote attacker to execute arbitrary code via the njs_object_property…
- CVE-2020-19692 — Critical (CVSS 9.8): Buffer Overflow vulnerabilty found in Nginx NJS v.0feca92 allows a remote attacker to execute arbitrary code via the…
- CVE-2022-29379 — Critical (CVSS 9.8): Nginx NJS v0.7.3 was discovered to contain a stack overflow in the function njs_default_module_loader at…
- CVE-2022-27007 — Critical (CVSS 9.8): nginx njs 0.7.2 is affected suffers from Use-after-free in njs_function_frame_alloc() when it try to invoke from a…
- CVE-2022-25139 — Critical (CVSS 9.8): njs through 0.7.0, used in NGINX, was discovered to contain a heap use-after-free in njs_await_fulfilled.
- CVE-2021-46463 — Critical (CVSS 9.8): njs through 0.7.1, used in NGINX, was discovered to contain a control flow hijack caused by a Type Confusion…
Other CWE-416 (Use After Free) vulnerabilities
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- CVE-2026-4688 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox…
- CVE-2025-24085 — Critical (CVSS 10.0): A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.3 and iPadOS 18.3,…
- CVE-2024-43102 — Critical (CVSS 10.0): Concurrent removals of certain anonymous shared memory mappings by using the UMTX_SHM_DESTROY sub-request of…
- CVE-2021-32495 — Critical (CVSS 10.0): Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory…