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CVE-2026-53531— ratex-parser has unbounded parser recursion that leads to stack overflow (process abort)

Quick assessment

Affected
erweixin RaTeX
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

RaTeX 是一个用 Rust 编写的、与 KaTeX 兼容的数学公式渲染引擎。在 0.1.11 版本之前，RaTeX 的递归下降解析器在处理 、 、 、 等结构时，每增加一个嵌套层级就会递归调用一个（或多个）原生栈帧，且没有设置最大深度限制。当输入包含约 10 KB 的嵌套结构时，就会耗尽主线程默认的 8 MB 栈空间，导致进程中止。即使通过配置 （见 第 48 行），由于 Rust 中的栈溢出无论如何都会触发致命的 信号（与 panic 策略无关），因此该漏洞会导致不可恢复的、整个进程范围的拒绝服务（DoS），

CVSS 6.9 · Medium EPSS 0.26% · P18

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
erweixin RaTeX < 0.1.11 affected
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I. Basic Information for CVE-2026-53531

Vulnerability Information
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Vulnerability Title
ratex-parser has unbounded parser recursion that leads to stack overflow (process abort)
Source: CVE Program / CVE List V5
Vulnerability Description
RaTeX is a KaTeX-compatible math rendering engine written in Rust. Prior to version 0.1.11, RaTeX’s recursive-descent parser recurses one (or more) native stack frame per nesting level at `{`, `\left`, `\sqrt{`, `^{`, etc, with no maximum depth limit. A short, ~10 KB input of nested groups overflows the 8 MB main-thread stack and aborts the process. With `panic = "abort"` (`Cargo.toml:48`), and because a Rust stack overflow is always a fatal `SIGABRT` regardless of panic strategy this is an unrecoverable, whole-process denial of service reachable from a single untrusted LaTeX string. Version 0.1.11 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
erweixin RaTeX < 0.1.11 -

II. Public POCs for CVE-2026-53531

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III. Intelligence Information for CVE-2026-53531

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Vendor Advisories for CVE-2026-53531 (1)

IV. Related Vulnerabilities

Same product: RaTeX
Same vendor: erweixin
Same weakness: CWE-400

V. Comments for CVE-2026-53531

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