What is CVE-2026-103977?

CVE-2026-103977 is a high-severity vulnerability in Error311 Filerise, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 8.1/10. Published 2026-10-14.

How severe is CVE-2026-103977?

High severity. CVSS v3 base score is 8.1 out of 10.

Is CVE-2026-103977 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Error311 Filerise

CVE-2026-103977

FileRise is a self-hosted web-based file manager with multi-file upload, editing, and batch operations. Prior to 3.23.0, FileRise stores failed TOTP verification attempts in $_SESSION. An attacker who already possesses a target account's valid primary credential can restart the login workflow in a new session and restore the second-factor attempt allowance, permitting continued online TOTP guessing beyond the intended five-attempt limit. The pending-login TOTP handlers did not share a durable account-wide limit. This issue is fixed in version 3.23.0.

Published 2026-10-14 · last modified 2026-10-14.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Error311 Filerise — versions < 3.23.0

Weakness classification (CWE)

Public proof-of-concept exploits

pervinzahidli/CVE-2026-103977

References

Frequently asked questions

What is CVE-2026-103977?: CVE-2026-103977 is a high-severity vulnerability in Error311 Filerise, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 8.1/10. Published 2026-10-14.
How severe is CVE-2026-103977?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2026-103977 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.