CVE-2026-32805Public exploitNetwork attack vector

Arbitrary file write via archive prefix collision

Published Mar 18, 2026 · Updated Mar 18, 2026

Path traversal in CTFer.io Romeo before 0.2.2 allows remote attackers to write files outside the extraction directory via a crafted archive. sanitizeArchivePath joins each archive entry to the destination and accepts any joined path sharing the destination's string prefix, without requiring a trailing separator. Exploitation requires a malicious archive to reach the shared coverage volume and the webserver download CLI to extract it, yielding arbitrary file writes with the CLI process's permissions.

CVSS severity8.3
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in CTFer.io Romeo before 0.2.2 allows remote attackers to write files outside the extraction directory via a crafted archive. sanitizeArchivePath joins each archive entry to the destination and accepts any joined path sharing the destination's string prefix, without requiring a trailing separator. Exploitation requires a malicious archive to reach the shared coverage volume and the webserver download CLI to extract it, yielding arbitrary file writes with the CLI process's permissions.

The record

CVE
CVE-2026-32805
Published
Mar 18, 2026
Updated
Mar 18, 2026
Vendor
CTFer.io
Product
Romeo
Classifications
CWE-22, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 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=< 0.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CTFer.io · Romeoversion=< 0.2.2

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
8.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:L/SA:L

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 exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1203Exploitation for Client Execution

Public exploit references

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Technologies

Your stack

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Your stack

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