CVE-2026-124553

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.

References

• https://github.com/funstory-ai/BabelDOC/blob/main/docs/release-notes/v0.7.0.md
• https://github.com/funstory-ai/BabelDOC/blob/v0.6.4/babeldoc/format/pdf/new_parser/runtime/to_unicode_parser_runtime.py#L150-L158
• https://github.com/funstory-ai/BabelDOC/blob/v0.6.4/babeldoc/pdfminer/cmapdb.py#L378-L389
• https://github.com/funstory-ai/BabelDOC/commit/39a6e9eafeecd39404b94b2f71e88ea058753dd5
• https://github.com/funstory-ai/BabelDOC/security/advisories/GHSA-wrv8-h9rp-6fqq