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PatchSiren cyber security CVE debrief

CVE-2026-55884 tilt-dev CVE debrief

CVE-2026-55884 is a critical vulnerability in Tilt, a tool for defining dev environments as code for microservice apps on Kubernetes. The vulnerability allows unauthenticated network callers to trigger developer-defined resources, tamper with Tiltfile arguments, read full engine state including the session token, and invoke apiserver resources when bound to a non-loopback address. This issue affects Tilt versions from 0.20.8 through 0.37.3 and is fixed in version 0.37.4.

Vendor
tilt-dev
Product
tilt
CVSS
CRITICAL 9.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-10
Original CVE updated
2026-07-29
Advisory published
2026-07-10
Advisory updated
2026-07-29

Who should care

Users of Tilt, especially those binding the HUD to a non-loopback address, should update to version 0.37.4 to mitigate this critical vulnerability. Affected operators, platform administrators, vulnerability management teams, and security teams should review the CVE record and NVD entry for details on the vulnerability and fixed version.

Technical summary

The Tilt HUD HTTP server lacks authenticating middleware, allowing unauthenticated network callers to trigger developer-defined resources, tamper with Tiltfile arguments, read full engine state, and invoke apiserver resources when bound to a non-loopback address. This issue affects Tilt versions from 0.20.8 through 0.37.3 and is fixed in version 0.37.4. The vulnerability has a CVSS score of 9.2 and is considered critical.

Defensive priority

High

Recommended defensive actions

  • Update Tilt to version 0.37.4 or later
  • Review and restrict HUD binding to loopback addresses where possible
  • Monitor Tilt HUD exposure and access controls
  • Implement additional authentication and authorization measures for Tilt HUD
  • 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 and NVD entry provide details on the vulnerability, affected versions, and fixed version. The source item URL and references offer additional context. Evidence is limited, and defenders should verify Tilt HUD exposure and access controls. The vulnerability allows unauthenticated network callers to trigger developer-defined resources, tamper with Tiltfile arguments, read full engine state including the session token, and invoke apiserver resources when bound to a non-loopback address.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-55884 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-55884

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

  • CVE-2026-55884 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-55884

    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.