CVE-2026-73057

8.7 highEPSS 0.3%

High (8.7). EPSS 0.3% chance of exploitation in the next 30 days.

stoatchat before 0.15.0 fails to validate SVG viewBox dimensions in the proxy endpoint, allowing attackers to cause denial of service by memory exhaustion. Attackers can host malicious SVGs with extremely large width and height values and trigger concurrent requests to exhaust available memory across proxy replicas.

Severity

CVSS 4.0

8.7 high

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 27% of CVEs (scores of 2026-10-31)
CWE: CWE-400
Published: 2026-08-16
Modified: 2026-09-24
Record from: the NVD, synced 2026-10-19

References

https://github.com/stoatchat/stoatchat/security/advisories/GHSA-x87r-h3mq-7mgr
https://www.vulncheck.com/advisories/stoatchat-before-uncapped-svg-rendering-denial-of-service
https://github.com/stoatchat/stoatchat/security/advisories/GHSA-x87r-h3mq-7mgr

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