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CVE-2025-61622

59
FAUCET Score

CVE-2025-61622 is a critical deserialization of untrusted data vulnerability affecting pyfory versions 0.12.0 through 0.12.2, and legacy versions 0.1.0 through 0.10.3. An attacker can craft a malicious data stream that forces the use of a vulnerable pickle-fallback serializer, leading to arbitrary code execution on systems that process untrusted pyfory serialized data. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over the network with low complexity and no user interaction, allowing for complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation, public exploit code, or KEV listing, the vulnerability has garnered some community discussion, and users are strongly advised to upgrade to pyfory version 0.12.3 or later to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.1.0, <= 0.10.3CPE matchmatch criteria
cpe:2.3:a:apache:fory:*:*:*:*:*:*:*:*
>= 0.12.0, <= 0.12.2CPE matchmatch criteria
cpe:2.3:a:apache:fory:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
41.25%
Probability of exploitation in next 30 days
EPSS Percentile
98.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.4125 is in the 96th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

pippatch availablevia ghsa
Product: pyforyFixed in: 0.12.3

Vendor Advisories (1)

pipGHSA-538v-3wq9-4h3rcritical

Apache Pyfory python is vulnerable to deserialization of untrusted data

Oct 1, 2025

References

openwall.com / lists/oss-security/2025/09/29/3
Mailing ListThird Party Advisory
lists.apache.org / thread/vfn9hp9qt06db5yo1gmj3l114o3o2csd
Issue TrackingVendor Advisory