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PatchSiren cyber security CVE debrief

CVE-2025-71377 stoatchat CVE debrief

A logic error was found in the query messages route of stoatchat (delta) versions before 20250210-1 (0.8.2). This error allows a remote unauthenticated attacker to craft requests that can download the entire message history of a channel in a single request, potentially leading to denial of service through resource exhaustion. The vulnerability has a CVSS score of 8.7 and is classified as HIGH severity.

Vendor
stoatchat
Product
Unknown
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-16
Original CVE updated
2026-07-20
Advisory published
2026-07-16
Advisory updated
2026-07-20

Who should care

Users of stoatchat (delta) versions before 20250210-1 (0.8.2) should be aware of this vulnerability as it can lead to significant resource exhaustion and potential denial of service attacks. Operators, platform administrators, vulnerability management teams, and security teams should review the official advisory and take necessary actions to mitigate the vulnerability.

Technical summary

The vulnerability in stoatchat (delta) versions before 20250210-1 (0.8.2) stems from a logic error in the query messages route. When fetching messages 'nearby' another message, the database query can be given a message limit of zero. The database interprets this as 'no limit', allowing an attacker to download the entire message history of a channel in a single request. This can be exploited by a remote unauthenticated attacker who can send multiple such requests in parallel, leading to denial of service through resource exhaustion.

Defensive priority

High

Recommended defensive actions

  • Update stoatchat (delta) to version 20250210-1 (0.8.2) or later.
  • Implement rate limiting on message fetch requests to prevent abuse.
  • Monitor for unusual patterns of message fetch requests that could indicate an ongoing attack.
  • Consider implementing additional security measures such as authentication for message fetch requests.
  • 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 2026-07-16T13:16:24.057Z and was last modified on 2026-07-16T14:16:46.890Z. The NVD entry is currently Deferred. The vulnerability affects stoatchat (delta) versions before 20250210-1 (0.8.2). Evidence of exploitation is limited, and defenders should verify affected deployments and review official advisories.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-71377 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-71377

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

  • CVE-2025-71377 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-71377

    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.