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PatchSiren cyber security CVE debrief

CVE-2026-45802 Setasign CVE debrief

CVE-2026-45802 is a denial of service (DoS) vulnerability in FPDI, a PHP library for reading pages from existing PDF documents. Prior to version 2.6.7, an attacker can upload a small, malicious PDF file that will cause the server-side script to crash due to memory exhaustion or a script time-out. Repeated attacks can lead to sustained service unavailability. The vulnerability has been patched in version 2.6.7.

Vendor
Setasign
Product
FPDI
CVSS
MEDIUM 6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-11
Original CVE updated
2026-06-11
Advisory published
2026-06-11
Advisory updated
2026-06-11

Who should care

Users of FPDI library prior to version 2.6.7 should upgrade to version 2.6.7 or later to prevent denial of service attacks.

Technical summary

The vulnerability exists in FPDI library prior to version 2.6.7. An attacker can upload a small, malicious PDF file that will cause the server-side script to crash due to memory exhaustion or a script time-out.

Defensive priority

MEDIUM

Recommended defensive actions

  • Upgrade FPDI library to version 2.6.7 or later.
  • Validate and sanitize user-uploaded PDF files.

Evidence notes

CVE-2026-45802 has a CVSS score of 6 and is classified as MEDIUM severity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45802 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45802

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-45802 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45802

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.