CVE-2026-54502— Oj: Stack Buffer Overflow in Oj.dump via Large Indent
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-54502
Vulnerability Information
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Vulnerability Title
Oj: Stack Buffer Overflow in Oj.dump via Large Indent
Source: CVE Program / CVE List V5
Vulnerability Description
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, Oj.dump is vulnerable to a stack-based buffer overflow when a large :indent value is provided by the developer. fill_indent in dump.h calls memset(indent_str, ' ', (size_t)opts->indent) without validating the size. When opts->indent is set to INT_MAX (2,147,483,647), the (size_t) cast preserves the large value and memset writes 2 GB into the stack-allocated out buffer (4,184 bytes), corrupting the stack and crashing the process. This issue has been fixed in version 3.17.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Peter Ohler oj 缓冲区错误漏洞
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之前版本存在缓冲区错误漏洞，该漏洞源于dump.h中的fill_indent函数在调用memset时未验证大小，当indent参数设置为INT_MAX时，可能导致栈缓冲区溢出，从而破坏堆栈并导致进程崩溃。
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-2026-54502
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Vendor Advisories for CVE-2026-54502 (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-2026-54899 | Oj: Use-After-Free in Oj::Parser Symbol Key Cache Toggle | |
| 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-2026-54898 | 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-121
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Comfast CF-N1-S Web Management mbox-config sub_41AD7C stack- - CVE-2026-77946
TRENDnet TEW-821DAP NTP Timezone Configuration apply_time.cg - CVE-2026-17250
Authenticated Remote Code Execution via Stack-Based Buffer O - CVE-2026-17138
Vulnerabilities in IBM AIX and PowerVM VIOS - CVE-2026-16945
Vulnerabilities in IBM AIX and PowerVM VIOS
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