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HIGHCVE-2026-25808Published Modified CNA GitHub_M

CVE-2026-25808: Hollo DMs get leaked and can be seen on Webfinger Browser

Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Prior to 0.6.20 and 0.7.2, there is a security vulnerability where DMs and followers-only posts were exposed through the ActivityPub outbox endpoint without authorization. This vulnerability is fixed in 0.6.20 and 0.7.2.

Metrics

CVSS v3.1
7.5
Severity
HIGH
Fixed in
—
Affected Products
1
Affected packages
  • fedify-dev / hollo
    < 0.6.20, 0.7.2 · >= 7.0.0, < 0.7.2
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
CVE-2026-25808: Hollo DMs get leaked and can be seen on Webfinger Browser | HarborGuard CVE