CVE-2026-73057 json
stoatchat before 0.15.0 Uncapped SVG Rendering Denial of Service
published 3mo ago modified last mo. also EUVD-2026-59943 , GHSA-x87r-h3mq-7mgr
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository stoatchat/stoatchat. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 27%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- stoatchat stoatchat 0.15.0
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- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2mo ago
Exploit prediction
0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-11).
Exploits and checks
- github.com https://github.com/stoatchat/stoatchat/security/advisories/GHSA-x87r-h3mq-7mgr referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | 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 |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 4.0 | 8.7 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- stoatchat stoatchat
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
github.com
/stoatchat/stoatchat/security/advisories/GHSA-x87r-h3mq-7mgr
vendor-advisory, exploit, advisory
-
vulncheck.com
/advisories/stoatchat-before-uncapped-svg-rendering-denial-of-service
third-party-advisory
Sources
- CVE List CVE-2026-73057
- NVD CVE-2026-73057
- Maintainer advisory GHSA-x87r-h3mq-7mgr
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of stoatchat/stoatchat published their own advisory on GitHub. Reviewed sources take precedence over it.