File disclosure via unrestricted absolute paths
Published Aug 6, 2026 · Updated Aug 6, 2026
Path traversal in NanoCo NanoClaw 2.0.0 through 2.0.64 allows attackers to read container-visible files through send_file. The handler preserves absolute paths, checks only that the target exists, and copies it into the outbound attachment outbox without canonicalization or a trusted-root containment check. A prompt-injected or compromised agent must invoke the tool; any readable mounted file can then be delivered to a configured messaging destination.
Summary
What happened
Path traversal in NanoCo NanoClaw 2.0.0 through 2.0.64 allows attackers to read container-visible files through send_file. The handler preserves absolute paths, checks only that the target exists, and copies it into the outbound attachment outbox without canonicalization or a trusted-root containment check. A prompt-injected or compromised agent must invoke the tool; any readable mounted file can then be delivered to a configured messaging destination.
The record
- CVE
- CVE-2026-18991
- Published
- Aug 6, 2026
- Updated
- Aug 6, 2026
- Vendor
- NanoCo
- Product
- NanoClaw
- Classifications
- CWE-22, T1041
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 6, 2026CVE publishedPublication date reported by the CVE source.
- Aug 6, 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.
- Affected versionversion=2.0.0
- Affected versionversion=2.0.1
- Affected versionversion=2.0.10
- Affected versionversion=2.0.11
- Affected versionversion=2.0.12
- Affected versionversion=2.0.13
- Affected versionversion=2.0.14
- Affected versionversion=2.0.15
- Affected versionversion=2.0.16
- Affected versionversion=2.0.17
- Affected versionversion=2.0.18
- Affected versionversion=2.0.19
- Affected versionversion=2.0.2
- Affected versionversion=2.0.20
- Affected versionversion=2.0.21
- Affected versionversion=2.0.22
- Affected versionversion=2.0.23
- Affected versionversion=2.0.24
- Affected versionversion=2.0.25
- Affected versionversion=2.0.26
- Affected versionversion=2.0.27
- Affected versionversion=2.0.28
- Affected versionversion=2.0.29
- Affected versionversion=2.0.3
- Affected versionversion=2.0.30
- Affected versionversion=2.0.31
- Affected versionversion=2.0.32
- Affected versionversion=2.0.33
- Affected versionversion=2.0.34
- Affected versionversion=2.0.35
- Affected versionversion=2.0.36
- Affected versionversion=2.0.37
- Affected versionversion=2.0.38
- Affected versionversion=2.0.39
- Affected versionversion=2.0.4
- Affected versionversion=2.0.40
- Affected versionversion=2.0.41
- Affected versionversion=2.0.42
- Affected versionversion=2.0.43
- Affected versionversion=2.0.44
- Affected versionversion=2.0.45
- Affected versionversion=2.0.46
- Affected versionversion=2.0.47
- Affected versionversion=2.0.48
- Affected versionversion=2.0.49
- Affected versionversion=2.0.5
- Affected versionversion=2.0.50
- Affected versionversion=2.0.51
- Affected versionversion=2.0.52
- Affected versionversion=2.0.53
- Affected versionversion=2.0.54
- Affected versionversion=2.0.55
- Affected versionversion=2.0.56
- Affected versionversion=2.0.57
- Affected versionversion=2.0.58
- Affected versionversion=2.0.59
- Affected versionversion=2.0.6
- Affected versionversion=2.0.60
- Affected versionversion=2.0.61
- Affected versionversion=2.0.62
- Affected versionversion=2.0.63
- Affected versionversion=2.0.64
- Affected versionversion=2.0.7
- Affected versionversion=2.0.8
- Affected versionversion=2.0.9
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- send_file absolute-path verification harnessproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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