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Vulnerabilities

Security incident · MAL-2026-17756

Malicious code in pafer (PyPI)

Published Oct 10, 2026 · catalog updated Oct 20, 2026 · Malicious code in pafer

Open the advisory

Exploitation likelihood is not on this record for MAL-2026-17756. A missing EPSS score is not a low risk. Compare Malicious code in pafer with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Malicious code in pafer).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Not established
Affected products
PyPI pafer

--- _-= Per source details. Do not edit below this line.=-_ ## Source: kam193 (a74b7c5b356a87fe0262954cbedbcc432497ab25edaccbade0ce9ce04b16a8c9) In this campaign, the main package (webreader) has an embeded pickle disguised as a config. A related dependency (pafer) contains code to load the pickle. During unpickling, malicious code embeded in the pickle file is automatically executed. It then establishes persistence via a PTH file and downloads the next stage payload. It finally acts like a RAT, allowing remote exfiltration and code execution. --- Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: 2026-10-webreader Reasons (based on the campaign): - rat - Downloads and executes a remote malicious script. - obfuscation - The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine. - abuses-pth - persistence - The malicious code is intentionally included in a dependency of the package - files-exfiltration

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • PyPI pafer0.9.7, 0.9.8

How to fix MAL-2026-17756

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for MAL-2026-17756. A missing EPSS score is not a low risk. Compare Malicious code in pafer with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 0.9.7, 0.9.8. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 10, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    --- _-= Per source details. Do not edit below this line.=-_ ## Source: kam193 (a74b7c5b356a87fe0262954cbedbcc432497ab25edaccbade0ce9ce04b16a8c9) In this campaign, the main package (webreader) has an embeded pickle disguised as a config. A related dependency (pafer) contains code to load the pickle. During unpickling, malicious code embeded in the pickle file is automatically executed. It then esta

  2. Oct 20, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    --- _-= Per source details. Do not edit below this line.=-_ ## Source: kam193 (a74b7c5b356a87fe0262954cbedbcc432497ab25edaccbade0ce9ce04b16a8c9) In this campaign, the main package (webreader) has an embeded pickle disguised as a config. A related dependency (pafer) contains code to load the pickle. During unpickling, malicious code embeded in the pickle file is automatically executed. It then esta

Sources

References

Freshness

Last verified in this catalog Oct 20, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.