How severe is CVE-2026-55249?

CVE-2026-55249 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2026-55249 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-55249?

CVE-2026-55249 affects Rtkai Rtk-rewrite. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-55249?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-55249 have an EU (EUVD) identifier?

Yes. CVE-2026-55249 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38571.

When was CVE-2026-55249 published?

CVE-2026-55249 was published on 2026-06-23 and last updated on 2026-07-01.

CVE-2026-55249

CVE-2026-55249 is a medium-severity vulnerability in Rtkai Rtk-rewrite with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38571
Weakness: CWE-78
Affected product: Rtkai Rtk-rewrite
Published: 2026-06-23
Last modified: 2026-07-01

Description

@rtk-ai/rtk-rewrite transparently rewrites shell commands executed via OpenClaw's exec tool to their RTK equivalents. In 1.0.0, the @rtk-ai/rtk-rewrite OpenClaw plugin passes attacker-controlled input directly into a shell-backed execSync() template string without shell-safe escaping. JSON.stringify() wraps the value in double quotes and escapes inner double-quotes and backslashes, but leaves $() and backtick shell metacharacters untouched. Because execSync delegates execution to /bin/sh -c, the shell expands $(...) substitutions even inside double-quoted strings, causing the injected subcommand to execute before rtk is invoked. An attacker who can influence the exec tool's command parameter (e.g., via an LLM agent prompt or gateway/tool-call input) achieves arbitrary OS command execution with the privileges of the plugin/gateway process.

Frequently asked questions

What is CVE-2026-55249?: @rtk-ai/rtk-rewrite transparently rewrites shell commands executed via OpenClaw's exec tool to their RTK equivalents. In 1.0.0, the @rtk-ai/rtk-rewrite OpenClaw plugin passes attacker-controlled input directly into a shell-backed execSync() template string without shell-safe escaping. JSON.stringify() wraps the value in double quotes and escapes inner double-quotes and backslashes, but leaves $() and backtick shell metacharacters untouched. Because execSync delegates execution to /bin/sh -c, the shell expands $(...) substitutions even inside double-quoted strings, causing the injected subcommand to execute before rtk is invoked. An attacker who can influence the exec tool's command parameter (e.g., via an LLM agent prompt or gateway/tool-call input) achieves arbitrary OS command execution with the privileges of the plugin/gateway process.
How severe is CVE-2026-55249?: CVE-2026-55249 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2026-55249 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-55249?: CVE-2026-55249 affects Rtkai Rtk-rewrite. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-55249?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-55249 have an EU (EUVD) identifier?: Yes. CVE-2026-55249 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38571.
When was CVE-2026-55249 published?: CVE-2026-55249 was published on 2026-06-23 and last updated on 2026-07-01.

References

https://github.com/rtk-ai/rtk/security/advisories/GHSA-fqgj-m2gp-mr3q

Affected products (1)

cpe:2.3:a:rtkai:rtk-rewrite:1.0.0:*:*:*:*:rust:*:*

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