CVE-2026-53436

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 59/100
Published: 2026-06-10 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth

CVSS Vector Breakdown

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

Description

Jenkins 2.567 and earlier, LTS 2.555.2 and earlier improperly determines that a redirect URL after login is legitimately pointing to Jenkins when it contains relative path segments (`./` or `../`), allowing attackers to perform phishing attacks.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
jenkins jenkins < 2.555.3
jenkins jenkins < 2.568

Bug Bounty Relevance

59 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

4.3 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS — Exploitation Probability

0.28%
Raw Score 0.002820
Percentile 20.7%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00282
2026-10-28
0.00282

Intelligence Sources

nvd ref →