CVE-2026-30916

Rejected escaping bypass via trusted link chains

Published Mar 9, 2026 · Updated Mar 9, 2026

A shell-identification issue in Eric Cornelissen Shescape before 2.1.9 was reported to allow attackers to bypass escaping via a link chain. The resolver followed only one filesystem link, causing it to select escaping rules for the intermediate link name rather than the actual shell. GitHub rejected the CVE because Shescape's threat model treats the required host filesystem and configuration as trusted, so the behavior is not considered a security issue.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A shell-identification issue in Eric Cornelissen Shescape before 2.1.9 was reported to allow attackers to bypass escaping via a link chain. The resolver followed only one filesystem link, causing it to select escaping rules for the intermediate link name rather than the actual shell. GitHub rejected the CVE because Shescape's threat model treats the required host filesystem and configuration as trusted, so the behavior is not considered a security issue.

The record

CVE
CVE-2026-30916
Published
Mar 9, 2026
Updated
Mar 9, 2026
Vendor
Eric Cornelissen
Product
Shescape
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 9, 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=< 2.1.9

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Eric Cornelissen · Shescapeversion=< 2.1.9

Published CVSS scores

No CVSS assessment is available in this record.

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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