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CVE-2026-5709 AWS CVE debrief

CVE-2026-5709 is a high-severity vulnerability in AWS Research and Engineering Studio (RES). The issue arises from unsanitized input in the FileBrowser API, which could allow a remote authenticated actor to execute arbitrary commands on the cluster-manager EC2 instance. This vulnerability affects RES versions 2024.10 through 2025.12.01. Users are advised to upgrade to RES version 2026.03 or apply the corresponding mitigation patch. The vulnerability requires authentication but could lead to significant impact if exploited, emphasizing the need for prompt remediation.

Vendor
AWS
Product
Research and Engineering Studio (RES)
CVSS
HIGH 7.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-06
Original CVE updated
2026-07-24
Advisory published
2026-04-06
Advisory updated
2026-07-24

Who should care

Organizations using AWS Research and Engineering Studio (RES) versions 2024.10 through 2025.12.01 should prioritize patching or mitigating this high-severity vulnerability. The vulnerability requires authentication but could lead to significant impact if exploited, emphasizing the need for prompt remediation by security teams and RES administrators.

Technical summary

The vulnerability is caused by unsanitized input in the FileBrowser API of AWS Research and Engineering Studio (RES). This flaw could allow a remote authenticated actor to execute arbitrary commands on the cluster-manager EC2 instance by providing crafted input when using the FileBrowser functionality. The affected versions of RES are from 2024.10 to 2025.12.01. The CVSS score for this vulnerability is 7.7, indicating high severity. The vulnerability can be mitigated by upgrading to RES version 2026.03 or applying the corresponding mitigation patch.

Defensive priority

High

Recommended defensive actions

  • Upgrade to RES version 2026.03
  • Apply the corresponding mitigation patch to existing environments
  • Restrict access to the FileBrowser API
  • Monitor for suspicious activity in RES environments
  • 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

Evidence notes

The CVE record was published on 2026-04-06T22:16:25.627Z and was last modified on 2026-07-24T09:10:00.153Z. The NVD entry is currently Analyzed. The vulnerability affects RES versions 2024.10 through 2025.12.01. Users are advised to upgrade to RES version 2026.03 or apply the corresponding mitigation patch. Evidence limits suggest verifying affected scope and vendor guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-5709 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-5709

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

  • CVE-2026-5709 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-5709

    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://aws.amazon.com/security/security-bulletins/2026-014-aws/

    ff89ba41-3aa1-4d27-914a-91399e9639e5 - Vendor Advisory

  • Source reference

    Unverified legacy reference

    URL: https://github.com/aws/res/issues/150

    ff89ba41-3aa1-4d27-914a-91399e9639e5 - Exploit, Issue Tracking

  • Mitigation or vendor reference

    Unverified legacy reference

    URL: https://github.com/aws/res/releases/tag/2026.03

    ff89ba41-3aa1-4d27-914a-91399e9639e5 - Release Notes

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.