Dashboard / CVE-2026-26247

CVE-2026-26247

CRITICAL
INFO Priority: 0.04 BB Relevance: 78/100
Published: 2026-07-03 Modified: 2026-10-25 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: High
I: High
A: None

Description

Gitea versions before 1.25.5 do not persist the OAuth2 PKCE S256 challenge method correctly during authorization, allowing token exchange without the expected verifier check.

Weakness Classification (1)

References & Advisories (4)

Bug Bounty Relevance

78 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

9.1 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS — Exploitation Probability

0.50%
Raw Score 0.004950
Percentile 42.4%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00495
2026-10-28
0.00495

Intelligence Sources

nvd ref →

External Links