CVE-2026-54898

CVE-2026-54898 (Oj gem) affects the Ruby JSON parser Oj in versions before 3.17.2. The vulnerability occurs when a SAJ/SAJ2 callback mutates the input string during parsing, causing the C engine’s raw pointer into Ruby’s string buffer to become dangling and resulting in a heap use-after-free on t...

CVE-2026-54898 Oj: Use-After-Free in Oj::Parser SAJ Callback via Input Mutation

Oj Optimized JSON is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2,Oj::Parserparse is vulnerable to a heap use-after-free when a SAJ/SAJ2 callback mutates the input JSON string during parsing. The C engine holds a raw const byte pointer into the Ruby...

CVE-2026-54897

Oj (Optimized JSON) Ruby gem versions prior to 3.17.2 contain a heap use-after-free in Oj::Doc iterators (each_value, each_child, each_leaf). If a Ruby block yields during iteration and doc.close or d.close is called, the heap memory is freed while the C iterator is active, leading to a use-after...

CVE-2026-54897

Oj Optimized JSON is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to 3.17.2, Oj::Doc iterators eachvalue, eachchild, eachleaf were vulnerable to a heap use-after-free. When a Ruby block yielded during iteration calls doc.close or d.close, the document's heap memory is freed...

CVE-2026-54896

Oj (Optimized JSON) Ruby gem prior to 3.17.2 is affected when operating in object mode; Oj.dump can trigger a heap buffer overflow while serializing Exception objects with a large indent value. The issue stems from allocating a buffer sized for object attributes but not accounting for accumulated...

CVE-2026-54896 Oj: Heap Buffer Overflow in Oj.dump Exception Serialization via Large Indent

Oj Optimized JSON is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, when in object mode, Oj.dump is vulnerable to a heap buffer overflow when serializing Exception objects with a large :indent value. The serializer allocates a buffer sized for the object'...

CVE-2026-54502

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. fillindent in dump.h calls memsetindentstr, ' ', sizetopts-indent without...

CVE-2026-54502 Oj: Stack Buffer Overflow in Oj.dump via Large Indent

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. fillindent in dump.h calls memsetindentstr, ' ', sizetopts-indent without...

CVE-2026-54899

Oj (Optimized JSON) is a Ruby gem for JSON parsing/marshalling. Prior to 3.17.2, disabling symbol_keys on a reused Oj::Parser can cause a heap use-after-free when toggling symbol_keys from true to false: opt_symbol_keys_set frees the internal key cache but does not clear the pointer, so the next ...

CVE-2026-54899

Oj Optimized JSON is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to version 3.17.2, disabling symbolkeys on a reused Oj::Parser instance triggers a heap use-after-free. When symbolkeys is toggled from true to false, optsymbolkeysset frees the internal key cache cachefree but...

CVE-2026-54899 Oj: Use-After-Free in Oj::Parser Symbol Key Cache Toggle

Oj Optimized JSON is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to version 3.17.2, disabling symbolkeys on a reused Oj::Parser instance triggers a heap use-after-free. When symbolkeys is toggled from true to false, optsymbolkeysset frees the internal key cache cachefree but...

CVE-2026-48764

TypeBot is a chatbot builder tool. In versions prior to 3.17.2, SSRF validation is implemented by resolving a hostname once and checking whether the resolved IP belongs to a forbidden range allowing for DNS rebinding bypass. The root cause is a time-of-check to time-of-use gap in the SSRF guard...

CVE-2026-48764 TypeBot has SSRF in HTTP request and script fetch flows via DNS rebinding bypass

TypeBot is a chatbot builder tool. In versions prior to 3.17.2, SSRF validation is implemented by resolving a hostname once and checking whether the resolved IP belongs to a forbidden range allowing for DNS rebinding bypass. The root cause is a time-of-check to time-of-use gap in the SSRF guard...

CVE-2026-48764

TypeBot suffers an SSRF in HTTP request and script fetch flows prior to version 3.17.2. The root cause is a time‑of‑check/time‑of‑use gap: the hostname is validated once against a forbidden range, but the subsequent request resolves the hostname again and may connect to a different IP, enabling D...

PT-2026-50572

TypeBot is a chatbot builder tool. In versions prior to 3.17.2, SSRF validation is implemented by resolving a hostname once and checking whether the resolved IP belongs to a forbidden range allowing for DNS rebinding bypass. The root cause is a time-of-check to time-of-use gap in the SSRF guard...

Important: Red Hat Security Advisory: Red Hat Quay 3.17.2

Red Hat Quay 3.17.2 is now available with bug fixes. Quay 3.17.2...

CVE-2026-4420

Summary: CVE-2026-4420 affects Bludit with a Stored XSS in the “page creating” flow. An authenticated user with page-creation privileges (Author/Editor/Admin) can insert a malicious script into the tags field when creating an article. The payload executes when a victim visits the uploaded resourc...

CVE-2026-4420 Stored XSS via Page Creating functionality in Bludit

Bludit is vulnerable to Stored Cross-Site Scripting XSS in its page creating functionality. An authenticated attacker with page creation privileges such as Author, Editor, or Administrator can embed a malicious JavaScript payload in the tags field of a newly created article. This payload will be...

CVE-2026-4420 Stored XSS via Page Creating functionality in Bludit

Bludit is vulnerable to Stored Cross-Site Scripting XSS in its page creating functionality. An authenticated attacker with page creation privileges such as Author, Editor, or Administrator can embed a malicious JavaScript payload in the tags field of a newly created article. This payload will be...

CVE-2026-4420

Bludit is vulnerable to Stored Cross-Site Scripting XSS in its page creating functionality. An authenticated attacker with page creation privileges such as Author, Editor, or Administrator can embed a malicious JavaScript payload in the tags field of a newly created article. This payload will be...