CVE-2026-124553— BabelDOC from 0.3.61 before 0.7.0 Denial of Service via ToUnicode CMap Parsing

Quick assessment

Affected

funstory-ai BabelDOC

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.

BabelDOC 0.3.61 至 0.7.0 之前的版本存在资源耗尽漏洞，允许远程攻击者通过提供无限制的和范围来耗尽 CPU 和内存资源。攻击者可提交一个精心构造的 PDF 文件，其中嵌入的 ToUnicode CMap 声明了一个巨大的范围，从而触发数十亿次循环迭代，导致翻译工作进程停滞。

CVSS 7.5 · High Updated Nov 08, 2026

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

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Vulnerability Information

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Vulnerability Title

BabelDOC from 0.3.61 before 0.7.0 Denial of Service via ToUnicode CMap Parsing

Source: CVE Program / CVE List V5

Vulnerability Description

BabelDOC from 0.3.61 before 0.7.0 contains a resource exhaustion vulnerability that allows remote attackers to exhaust CPU and memory by supplying unbounded bfrange and cidrange spans. Attackers can submit a crafted PDF whose embedded ToUnicode CMap declares a huge range, driving billions of loop iterations and stalling the translation worker.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

不加限制或调节的资源分配

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
funstory-ai	BabelDOC	0.3.61 ~ 0.7.0	-

II. Public POCs for CVE-2026-124553

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-124553

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Other References for CVE-2026-124553 (6)

https://github.com/funstory-ai/BabelDOC/blob/v0.6.4/babeldoc/pdfminer/cmapdb.py#L378-L389 technical-description
https://github.com/funstory-ai/BabelDOC/blob/v0.6.4/babeldoc/format/pdf/new_parser/runtime/to_unicode_parser_runtime.py#L150-L158 technical-description
https://github.com/funstory-ai/BabelDOC/commit/39a6e9eafeecd39404b94b2f71e88ea058753dd5 patch
https://github.com/funstory-ai/BabelDOC/blob/main/docs/release-notes/v0.7.0.md release-notes
https://github.com/funstory-ai/BabelDOC/security/advisories/GHSA-wrv8-h9rp-6fqq vendor-advisory
https://www.vulncheck.com/advisories/babeldoc-from-0.3.61-before-0.7.0-denial-of-service-via-tounicode-cmap-parsing third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-124553

IV. Related Vulnerabilities

Same product: BabelDOC

CVE-2026-54071
BabelDOC: Arbitrary Code Execution via CMap Pickle Deseriali

Same vendor: funstory-ai

CVE-2026-54071
BabelDOC: Arbitrary Code Execution via CMap Pickle Deseriali

Same weakness: CWE-770