CVE-2026-73058 json
stoatchat before 0.15.0 SSRF via IPv6 unspecified address bypass
published 3mo ago modified 2mo ago also EUVD-2026-59944 , GHSA-4rmr-77qv-hq47
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
- 5.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 30%
- public exploits
- 0
- none known
Summary
stoatchat versions before 0.15.0 fail to block the IPv6 unspecified address (::) in the SSRF blocklist, allowing unauthenticated attackers to bypass protections via the /proxy and /embed endpoints. Attackers can craft requests using IPv6 literal syntax to access services on the loopback interface and retrieve sensitive internal content.
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
0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-11).
Exploits and checks
- github.com https://github.com/stoatchat/stoatchat/security/advisories/GHSA-4rmr-77qv-hq47 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N |
| CNA | 3.1 | 5.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N |
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/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-918 Server-Side Request Forgery
References
-
github.com
/stoatchat/stoatchat/security/advisories/GHSA-4rmr-77qv-hq47
vendor-advisory, exploit, advisory
-
vulncheck.com
/advisories/stoatchat-before-ssrf-via-ipv6-unspecified-address-bypass
third-party-advisory
Sources
- CVE List CVE-2026-73058
- NVD CVE-2026-73058
- Maintainer advisory GHSA-4rmr-77qv-hq47
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.