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CVE-2026-5936 Foxit CVE debrief

CVE-2026-5936 is a high-severity vulnerability in Foxit's PDF Services API, allowing attackers to control server-side HTTP requests. This behavior may be exploited to probe internal network services, access otherwise unreachable endpoints, or bypass network access controls, potentially leading to sensitive information disclosure and further compromise of the internal environment. Affected users should prioritize patching and review network access controls.

Vendor
Foxit
Product
PDF Services API
CVSS
HIGH 8.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-13
Original CVE updated
2026-07-07
Advisory published
2026-04-13
Advisory updated
2026-07-07

Who should care

Users of Foxit's PDF Services API, security teams, and network administrators should prioritize patching this vulnerability to prevent potential exploitation. This vulnerability could allow attackers to probe internal network services, access sensitive information, or bypass network access controls.

Technical summary

The vulnerability exists in Foxit's PDF Services API, allowing an attacker to control server-side HTTP requests by supplying a crafted URL. This could lead to probing internal network services, accessing unreachable endpoints, or bypassing network access controls. The vulnerability has a CVSS score of 8.5 and is classified as HIGH severity. Affected deployments should be identified and prioritized for patching.

Defensive priority

High

Recommended defensive actions

  • Apply the vendor-provided patch or mitigation
  • Review and update network access controls to restrict access to the PDF Services API
  • Monitor for suspicious activity and implement additional security measures to detect potential exploitation attempts
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-04-13T07:16:50.710Z and last modified on 2026-07-07T18:26:51.513Z. The NVD entry is currently Analyzed. Evidence is limited to public sources and may not reflect the full scope or impact of this vulnerability. Defenders should verify affected deployments and review official advisories for specific guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-5936 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-5936

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

  • CVE-2026-5936 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-5936

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

Supplemental references

  • Mitigation or vendor reference

    Unverified legacy reference

    URL: https://www.foxit.com/support/security-bulletins.html

    14984358-7092-470d-8f34-ade47a7658a2 - Vendor Advisory

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.