CVE-2026-54899— Oj: Use-After-Free in Oj::Parser Symbol Key Cache Toggle
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-54899
Vulnerability Information
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Vulnerability Title
Oj: Use-After-Free in Oj::Parser Symbol Key Cache Toggle
Source: NVD (National Vulnerability Database)
Vulnerability Description
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to version 3.17.2, disabling symbol_keys on a reused Oj::Parser instance triggers a heap use-after-free. When symbol_keys is toggled from true to false, opt_symbol_keys_set frees the internal key cache (cache_free) but does not clear the pointer. The next parse call reads from the freed cache via cache_intern, producing a use-after-free. This issue has been fixed in version 3.17.2.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
释放后使用
Source: NVD (National Vulnerability Database)
Vulnerability Title
Peter Ohler oj 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Peter Ohler oj是Peter Ohler个人开发者的一个高效JSON解析与代码生成的前端库。 Peter Ohler oj 3.17.2之前版本存在资源管理错误漏洞，该漏洞源于在重用Oj::Parser实例时禁用symbol_keys会触发堆释放后重用，当symbol_keys从true切换为false时，opt_symbol_keys_set释放内部键缓存但未清除指针，导致下一次解析调用时从已释放的缓存中读取，产生释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-54899
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Vendor Advisories for CVE-2026-54899 (1)
Same Patch Batch · ohler55 · 2026-06-30 · 11 CVEs total
| CVE-2026-54592 | 7.5 HIGH | Oj: Stack Buffer Overflow in Oj::Doc#each_child via Deeply Nested Input |
| CVE-2026-54500 | 5.3 MEDIUM | Oj: intern.c form_attr has an uninitialized stack read |
| CVE-2026-54897 | Oj : Use-After-Free in Oj::Doc Iterators via Reentrant Close | |
| CVE-2026-54903 | Oj: Integer Overflow in Oj.load 2GB String Handling | |
| CVE-2026-54902 | Oj: Use-After-Free in Oj::Parser SAJ Long Key Callback | |
| CVE-2026-54901 | Oj: Use-After-Free in Oj::Parser array_class/hash_class GC Marking | |
| CVE-2026-54900 | Oj: Negative-Size memcpy in Oj::Parser create_id Attribute Handling | |
| CVE-2026-54896 | Oj: Heap Buffer Overflow in Oj.dump Exception Serialization via Large Indent | |
| CVE-2026-54502 | Oj: Stack Buffer Overflow in Oj.dump via Large Indent | |
| CVE-2026-54898 | Oj: Use-After-Free in Oj::Parser SAJ Callback via Input Mutation |
IV. Related Vulnerabilities
Same product: oj
- CVE-2026-54903
Oj: Integer Overflow in Oj.load 2GB String Handling - CVE-2026-54902
Oj: Use-After-Free in Oj::Parser SAJ Long Key Callback - CVE-2026-54901
Oj: Use-After-Free in Oj::Parser array_class/hash_class GC M - CVE-2026-54900
Oj: Negative-Size memcpy in Oj::Parser create_id Attribute H - CVE-2026-54898
Oj: Use-After-Free in Oj::Parser SAJ Callback via Input Muta
Same vendor: ohler55
- CVE-2026-54903
Oj: Integer Overflow in Oj.load 2GB String Handling - CVE-2026-54902
Oj: Use-After-Free in Oj::Parser SAJ Long Key Callback - CVE-2026-54901
Oj: Use-After-Free in Oj::Parser array_class/hash_class GC M - CVE-2026-54900
Oj: Negative-Size memcpy in Oj::Parser create_id Attribute H - CVE-2026-54898
Oj: Use-After-Free in Oj::Parser SAJ Callback via Input Muta
Same weakness: CWE-416
- CVE-2026-14788
radareorg radare2 cfile.c r_core_bin_load use after free - CVE-2026-14760
radareorg radare2 regprofile disasm.c r_core_seek_arch_bits - CVE-2026-58294
Microsoft Edge (Chromium-based) Remote Code Execution Vulner - CVE-2026-58288
Microsoft Edge (Chromium-based) Remote Code Execution Vulner - CVE-2026-58276
Microsoft Edge (Chromium-based) Remote Code Execution Vulner
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