CVE-2026-27933Network attack vector

Session hijacking via cached asset cookies

Published Feb 25, 2026 · Updated Feb 25, 2026

Session management in Manyfold before 0.133.0 allows remote attackers to hijack user sessions through proxy-cached cookies. The send_file_content path sets a session cookie while delivering indexed assets, allowing an intervening cache to store and replay an authenticated cookie. Exploitation requires an intervening cache and a victim request; a leaked administrator cookie grants the corresponding account access.

CVSS severity6.8
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session management in Manyfold before 0.133.0 allows remote attackers to hijack user sessions through proxy-cached cookies. The send_file_content path sets a session cookie while delivering indexed assets, allowing an intervening cache to store and replay an authenticated cookie. Exploitation requires an intervening cache and a victim request; a leaked administrator cookie grants the corresponding account access.

The record

CVE
CVE-2026-27933
Published
Feb 25, 2026
Updated
Feb 25, 2026
Vendor
Manyfold
Product
Manyfold
Classifications
CWE-613, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.133.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Manyfold · Manyfoldversion=< 0.133.0

Published CVSS scores

6.8GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-613Insufficient Session Expiration
T1539Steal Web Session Cookie

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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