CVE-2026-16527

HIGH
MEDIUM Priority: 0.04 BB Relevance: 75/100
Published: 2026-07-30 Modified: 2026-11-04 First seen: 2026-11-04 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

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

Description

An unauthenticated remote attacker can bypass access controls by sending crafted requests to the PCP pmproxy /store endpoint. This allows the attacker to overwrite any PMDA metric, leading to arbitrary code execution and system takeover.

References & Advisories (12)

https://access.redhat.com/errata/RHSA-2026:55560
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55617
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55740
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:72272
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:72273
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:72593
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:72594
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:73767
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:74612
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:74613
vendor-advisory x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2506031
issue-tracking x_refsource_REDHAT

Bug Bounty Relevance

75 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.3 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS — Exploitation Probability

0.59%
Raw Score 0.005910
Percentile 48.8%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00591
2026-11-13
0.00591
2026-11-12
0.00591
2026-11-10
0.00591
2026-11-09
0.00591
2026-11-08
0.00591
2026-11-07
0.00591
2026-11-06
0.00591
2026-11-05
0.00591
2026-11-04
0.00591

Intelligence Sources

mitre ref →
nvd ref →