CVE-2026-108594: Mealie 3.26.0 through 3.28.0 SSRF via OIDC Picture Claim Avatar Fetch

Severity: low (CVSS 3.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-10 · updated 2026-10-14
Weakness: CWE-918

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.

Affected products

mealie-recipes mealie: from 3.26.0 through 3.28.0

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

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