NVD / CVE Program· CNA redhat

CVE-2026-16531: Pcp: pcp: arbitrary file creation via path traversal in pmproxy logger servlet

MediumCVSS 5.3 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 21/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.57% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: pcp (Debian:14) 7.2.0-1; pcp (openSUSE:Leap 16.0) 6.2.0-160000.4.1; pcp (openSUSE:Tumbleweed) 6.3.8-3.1.

Low priority for now. Upgrade to pcp (Debian:14) 7.2.0-1; pcp (openSUSE:Leap 16.0) 6.2.0-160000.4.1; pcp (openSUSE:Tumbleweed) 6.3.8-3.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

An unauthenticated remote attacker can exploit a path traversal vulnerability in the PCP pmproxy logger servlet using a crafted hostname. This allows arbitrary file and directory creation, potentially leading to a denial of service.

Published: Jul 30, 2026
Updated: Nov 10, 2026
EPSS: 0.5% · 47th percentile
CWE: CWE-22

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 21 / 40 · 5.3 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.5%

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · redhat: 5.3; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

Red Hat Red Hat Enterprise Linux 10
- 0:7.1.5-6.el10 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 6
- all versionsunknown
Red Hat Red Hat Enterprise Linux 7
- all versionsunknown
Red Hat Red Hat Enterprise Linux 8
- all versionsaffected
Red Hat Red Hat Enterprise Linux 9
- all versionsaffected
Red Hat Red Hat OpenShift Container Platform 4
- all versionsaffected
Red Hat Red Hat OpenShift Container Platform 5
- all versionsaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	pcp	from 0	—
Debian:14	pcp	before 7.2.0-1	7.2.0-1
openSUSE:Leap 16.0	pcp	before 6.2.0-160000.4.1	6.2.0-160000.4.1
openSUSE:Tumbleweed	pcp	before 6.3.8-3.1	6.3.8-3.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS	pcp	before 6.2.0-150400.5.15.1	6.2.0-150400.5.15.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS	pcp	before 6.2.0-150500.8.9.1	6.2.0-150500.8.9.1
SUSE:Linux Enterprise Module for Development Tools 15 SP7	pcp	before 6.2.0-150600.3.12.1	6.2.0-150600.3.12.1
SUSE:Linux Enterprise Server 12 SP5-LTSS	pcp	before 6.2.0-6.32.1	6.2.0-6.32.1
SUSE:Linux Micro 6.0	pcp	before 6.2.0-2.1	6.2.0-2.1
SUSE:Linux Micro 6.1	pcp	before 6.2.0-slfo.1.1_6.1	6.2.0-slfo.1.1_6.1
SUSE:Linux Micro 6.2	pcp	before 6.2.0-160000.4.1	6.2.0-160000.4.1

Same product

red hat: all records

Other highest-scoring records for the same primary product.

CVE-2025-10230Samba: command injection in wins server hook script
52Plan
CVE-2026-4631Cockpit: cockpit: unauthenticated remote code execution due to ssh command-line argument injection
44Plan
CVE-2026-76578Ipa: freeipa: freeipa: unauthenticated ldap client can obtain administrator credentials via the self-managed-token aci
39Monitor

Published before and after this one in the same product

← EarlierCVE-2026-16529Jul 30, 2026 · Pcp: pcp: denial of service due to signed integer overflow
30Monitor
← EarlierCVE-2026-16530Jul 30, 2026 · Pcp: pcp: remote denial of service and information leakage
26Monitor
Later →CVE-2026-58218Jul 30, 2026 · Samba: dns signing dos via tkey name cache exhaustion
21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
debian:pcp	7.2.0-1 · Debian:14	Package registry (OSV)
opensuse:pcp	6.3.8-3.1 · openSUSE:Tumbleweed	Package registry (OSV)
suse:pcp	6.2.0-2.1 · SUSE:Linux Micro 6.0	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Francisco Alisson Bezerra (TIM Security Red Team Research, TIM S.p.A), Lucas Gabriel Alves (TIM Security Red Team Research, TIM S.p.A), and Massimiliano Brolli (TIM Security Red Team Research, TIM S.p

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-9627555 days apartFlatpak: flatpak: arbitrary write access as root via extra-data extraction
35Monitor
CVE-2025-9566328 days apartPodman: podman kube play command may overwrite host files
32Monitor
CVE-2025-6020408 days apartLinux-pam: linux-pam directory traversal
31Monitor
CVE-2026-9627655 days apartFlatpak: flatpak: arbitrary write in host context via flatpak build-init
26Monitor
CVE-2026-10746670 days apartFlatpak-builder: local file exfiltration via `file
24Monitor
CVE-2026-8551883 days apartOpenscap: openscap: arbitrary file write via path traversal in source datastream decomposition
24Monitor

Not on record for this CVE: patch commit or PR link · public bounty program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: low · data or configuration can be modified
Availability: none

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: Low
Availability impact: None

Weakness class (CWE)

CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

nvd-secondary

Root cause

A user-supplied file name is joined with the allowed directory, but the result is never checked to confirm it is still inside that directory.

The bug in code

The whole CWE-22 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1const file = path.join(ROOT, req.query.name);
2res.sendFile(file);

Fixed

1const file = path.resolve(ROOT, req.query.name);
2if (!file.startsWith(ROOT + path.sep)) {
3  return res.sendStatus(400);
4}
5res.sendFile(file);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

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Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:44 PM UTC

For records you follow, these changes also arrive as notifications. →

References

access.redhat.com/errata/RHSA-2026:97299

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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