NVD / CVE Program· CNA apache

CVE-2025-61622: Apache Fory, Apache Fory: Python RCE via unguarded pickle fallback serializer in pyfory

Noroxi assessment

Priority: Plan (action score 53/100)

Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
Probability of exploitation in the next 30 days: 45.1% (FIRST EPSS); higher than 98.7% of all records.
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.
Fixed version: pyfory (PyPI) 0.12.3.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Add it to your regular patch cycle. Upgrade to pyfory (PyPI) 0.12.3 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

Deserialization of untrusted data in python in pyfory versions 0.12.0 through 0.12.2, or the legacy pyfury versions from 0.1.0 through 0.10.3: allows arbitrary code execution. An application is vulnerable if it reads pyfory serialized data from untrusted sources. An attacker can craft a data stream that selects pickle-fallback serializer during deserialization, leading to the execution of `pickle.loads`, which is vulnerable to remote code execution. Users are recommended to upgrade to pyfory version 0.12.3 or later, which has removed pickle fallback serializer and thus fixes this issue.

CriticalCVSS 9.8 · v3.1—Proof of concept Fix available

Published: Oct 1, 2025
Updated: Oct 9, 2026
EPSS: 45.1% · 98th percentile
CWE: CWE-502

Report tools

JSON

Action score

Plan

Add it to your regular patch cycle.

CVSS: 39 / 40 · 9.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 14 / 30 · 45.1%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
Proof of concept exists, no weaponized module
A fix has been released

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

Running WordPress? Scan your site free with WP Lens

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.

We use this product, ask for help

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.

Vendor	Product	CPE
apache	fory	cpe:2.3:a:apache:fory

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

apache fory0.1.0 and later · up to 0.10.3 inclusive
apache fory0.12.0 and later · up to 0.12.2 inclusive

Versions reported by the vendor

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

Apache Software Foundation Apache Fory
- 0.12.0 and later · up to and including 0.12.2affected · semver
- 0.1.0 and later · up to and including 0.10.3affected · semver

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
PyPI	pyfory	from 0.12.0 · before 0.12.3	0.12.3
PyPI	pyfury	from 0.1.0 · up to and including 0.10.3	—

Same product

apache: all records

Other highest-scoring records for the same primary product.

CVE-2026-71558Apache Fory: Heap type confusion in C++ polymorphic smart-pointer deserialization
39Monitor
CVE-2026-64606Apache Fory, Apache Fory: Class-registration bypass through an auto-admitted SerializedLambda capturing interface
39Monitor
CVE-2026-64608Apache Fory: Heap type confusion and out-of-bounds read/write in C++ compatible-mode field-skip paths
39Monitor

Published before and after this one in the same product

← EarlierCVE-2025-59328Sep 15, 2025 · Apache Fory: Denial of Service (DoS) due to Deserialization of Untrusted malicious large Data
26Monitor
Later →CVE-2026-48207May 21, 2026 · Apache Fory: PyFory ReduceSerializer Incomplete Policy Enforcement
39Monitor
Later →CVE-2026-50076Jun 4, 2026 · Apache Fory: Java ReplaceResolverSerializer deserialization checks bypass
36Monitor

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
PyPI:pyfory	0.12.3	Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Proof-of-concept repository on GitHub	stars:4	2025-10-03

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.

PublishedOct 1, 2025
First PoCOct 3, 2025+2 d
TodayOct 28, 2026+392 d

EPSS, last 120 days

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

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

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

Mapta / BugBunny_aireporter

Variant candidates

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

CVE-2026-48207232 days apartApache Fory: PyFory ReduceSerializer Incomplete Policy Enforcement
39Monitor
CVE-2026-64606293 days apartApache Fory, Apache Fory: Class-registration bypass through an auto-admitted SerializedLambda capturing interface
39Monitor
CVE-2026-64608293 days apartApache Fory: Heap type confusion and out-of-bounds read/write in C++ compatible-mode field-skip paths
39Monitor
CVE-2026-71558310 days apartApache Fory: Heap type confusion in C++ polymorphic smart-pointer deserialization
39Monitor
CVE-2026-50076246 days apartApache Fory: Java ReplaceResolverSerializer deserialization checks bypass
36Monitor
CVE-2026-71560310 days apartApache Fory: Out-of-bounds heap read in C++ struct deserializer tagged-int fast-path
36Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-25-0308 · Oct 2, 2025(Python Güvenlik Zafiyeti)

All national notices →

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: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

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

Weakness class (CWE)

CWE-502 · Deserialization of Untrusted Data

CVSS vector

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

nvd-secondary

Root cause

Data received over the network is deserialized into the language’s native object format without verifying its source. Code paths inside the object can be triggered during deserialization.

The bug in code

The whole CWE-502 class

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

Vulnerable

python

1payload = sock.recv(65536)
2job = pickle.loads(payload)

Fixed

python

1payload = sock.recv(65536)
2if not hmac.compare_digest(sign(payload), header_sig):
3    raise PermissionError("invalid signature")
4job = JobSchema.validate(json.loads(payload))