Information disclosure in Idno Known
CVE-2026-26273
Known is a social publishing platform. Prior to 1.6.3, a Critical Broken Authentication vulnerability exists in Known 1.6.2 and earlier. The application leaks the password reset token within a hidden HTML input field on the password reset page. This allows any unauthenticated attacker to retrieve the reset token for any user by simply querying the user's email, leading to full Account Takeover (ATO) without requiring access to the victim's email inbox. This vulnerability is fixed in 1.6.3.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.012 (65.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.012 · change: +0.004
Affected products
- Idno Known — versions < 1.6.3
- Withknown Known
Weakness classification (CWE)
References
- github.com/idno/known/security/advisories/GHSA-78wq-6gcv-w28r (Exploit, Vendor Advisory)
- github.com/idno/known/commit/8439a0747471559fb1ea9f074b929d390f27e66a (Patch)
- github.com/idno/known/releases/tag/1.6.3 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-26273?
- CVE-2026-26273 is a critical-severity vulnerability in Idno Known, classified under Information Disclosure. CVSS score: 9.8/10. Published 2026-02-13.
- How severe is CVE-2026-26273?
- Critical severity. CVSS v3 base score is 9.8 out of 10.