Public proof of concept

CVE-2025-61622

A public proof of concept exists; no exploitation attested.

Published2025-10-01
WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2025-10-0110:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2025-61622?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2025-61622?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Apache fory

Branch	Affected	Fixed in	Source
0.x	≥ 0.1.0, ≤ 0.10.3	no fix published	NVD
0.12	≥ 0.12.0, ≤ 0.12.2	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

lists.apache.orgVendor Advisory

Detection

read 2026-10-23 19:24 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedfa1consec/cve_2025_61622_poc

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2025-10-01
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.19.82025-10-01
CNAweakness (CWE)CWE-502read 2026-10-23
FIRST EPSSEPSS score45.1 %read 2026-10-23
PoC-in-GitHubproof of concept1read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2025-10-01
Last Modified: 2026-10-09
NVD status: Analyzed

Frequently asked questions

What is CVE-2025-61622?

Is CVE-2025-61622 actively exploited?

Active exploitation of CVE-2025-61622 has not been confirmed. Its EPSS score was 45.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-61622?

CVE-2025-61622 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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