High 8.2Published Sep 26, 2026

CVE-2026-100676stoatchat before 0.15.5 Local Filesystem Read via SVG

Updated under an hour ago (2026-10-19 07:00 UTC)

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It affects stoatchat. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.40%, higher than 32% of scored CVEs.

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Exploited in the last 30 days

January, the media proxy/embed service of stoatchat (stoatchat/stoatchat), before version 0.15.5 improperly resolves SVG <image href> values as local filesystem paths when a fetched resource is served as image/svg+xml. An unauthenticated remote attacker who causes the service to proxy an attacker-hosted SVG (e.g. via the /proxy endpoint) can determine whether local files exist through observable response-time differences, and can cause supported local image files to be disclosed after re-encoding. Because each referenced file is read in full with no effective limit on the number or total volume of reads, a single request can also generate an unbounded amount of local filesystem I/O and memory pressure (the published proof of concept drives about 4.34 GB of reads), leading to denial of service. The issue is fixed in 0.15.5.

CVSS: 8.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Weakness (CWE): CWE-693
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.40% (percentile 32)
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Sep 28, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

stoatchat stoatchat stoatchat:stoatchat (from the name)	before 0.15.5; 0.15.5 not affected	CNA record

References

https://github.com/stoatchat/stoatchat/security/advisories/GHSA-qv38-hwhv-jm49vendor-advisory
https://www.vulncheck.com/advisories/stoatchat-before-0.15.5-local-filesystem-read-via-svgthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.