CVE-2026-108594: SSRF (CVSS 3.5)

Description

Mealie 3.26.0 through 3.28.0 contains a server-side request forgery vulnerability in the OpenID Connect avatar fetch that ignores ports when allowlisting the identity provider hostname. Authenticated OIDC users who control their picture URL can make the server send GET requests to arbitrary ports on the provider's internal address on each login.

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CVSS v3.1 Score

3.5

LOW

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

EPSS — Exploit Prediction

0.0019

Probability of exploitation

0.08%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-918 Server-Side Request Forgery (SSRF)

References

Other References

https://github.com/mealie-recipes/mealie https://github.com/mealie-recipes/mealie/blob/v3.28.0/mealie/core/security/providers/openid_provider.py#L170-L200 https://github.com/mealie-recipes/mealie/blob/v3.28.0/mealie/pkgs/safehttp/transport.py#L60-L160 https://hackmd.io/@haind/mealie-oidc-avatar-ssrf https://www.vulncheck.com/advisories/mealie-3.26.0-through-3.28.0-ssrf-via-oidc-picture-claim-avatar-fetch

Frequently Asked Questions

What is CVE-2026-108594? +

Mealie 3.26.0 through 3.28.0 contains a server-side request forgery vulnerability in the OpenID Connect avatar fetch that ignores ports when allowlisting the identity provider hostname. Authenticated OIDC users who control their picture URL can make the server send GET requests to arbitrary ports on the provider's internal address on each login. It has a CVSS v3.1 base score of 3.5 (LOW).

How severe is CVE-2026-108594? +

CVE-2026-108594 has a CVSS v3.1 score of 3.5 out of 10, rated LOW. This is a low-severity vulnerability with limited impact. The EPSS score is 0.0019, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-108594? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2026-108594