Security readout for executives and security teams
Plain-English summary
OpenClaw before 2026.3.2 can let a local, low-privileged attacker cause ZIP extraction to write outside the intended folder. The issue is a timing flaw involving parent-directory symlinks. Business impact is mainly unauthorized file modification on systems where an attacker can run or influence OpenClaw extraction.
Executive priority
Treat as a moderate-priority patching item. It is not a remote internet-facing compromise based on the supplied sources, but it can allow unauthorized file writes where attackers already have local access or can influence archive extraction.
Technical view
The vulnerability is a CWE-367 time-of-check-time-of-use race in ZIP extraction. Path validation and file writing can be separated by a parent symlink rebind, redirecting output outside the extraction root. CVSS 4.0 is 5.8 with local access, low privileges, high attack complexity, high victim integrity impact, and limited availability impact.
Likely exposure
Exposure is limited to systems running OpenClaw versions prior to 2026.3.2 where local users can trigger or influence ZIP extraction. The bundle’s affected-version field is minimal and internally unclear, but the title and description consistently identify OpenClaw before 2026.3.2.
Exploitation context
No active exploitation is stated in the provided sources, and the CVE is not marked KEV. Exploitation requires local access, low privileges, and winning a race condition, which lowers practical likelihood but does not remove risk on shared or multi-user hosts.
Researcher notes
Focus validation on ZIP extraction path handling, symlink parent directories, and TOCTOU behavior. Do not assume broader remote exposure from the supplied evidence. The public bundle supports arbitrary file write outside the extraction root, not code execution or confirmed exploitation.
Mitigation direction
- Upgrade OpenClaw to version 2026.3.2 or later.
- Review the GitHub advisory and patch commit for vendor remediation details.
- Limit local users who can run OpenClaw until patched.
- Avoid processing archives from untrusted local users on vulnerable systems.
- Monitor extraction targets and nearby paths for unexpected file changes.
Validation and detection
- Inventory deployed OpenClaw versions and identify anything before 2026.3.2.
- Confirm patched systems report OpenClaw 2026.3.2 or later.
- Review workflows that extract ZIP archives on shared or multi-user hosts.
- Check file integrity around OpenClaw extraction directories after suspicious activity.
- Track vendor advisory updates for clarified affected-version data.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-367: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-27670 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.8 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N——VulnCheckCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L14.2VulnCheckVulnerability scoring details
Base CVSS 4.0 score
5.8MediumVector: CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- GitHub Security Advisory (GHSA-r54r-wmmq-mh84)CVE reference, VulnCheck · vendor-advisory
- Patch CommitCVE reference, VulnCheck · patch
- VulnCheck Advisory: OpenClaw < 2026.3.2 - Arbitrary File Write via ZIP Extraction Parent Symlink Race ConditionCVE reference, VulnCheck · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Time-of-check Time-of-use (TOCTOU) Race Condition
Time-of-check Time-of-use (TOCTOU) Race Condition represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.