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PatchSiren cyber security CVE debrief

CVE-2026-108543 ag2ai CVE debrief

A vulnerability was determined in ag2ai ag2 up to 0.13.4, affecting the UserProxyAgent component's os.path.join function, allowing for path traversal attacks. The attack can be carried out remotely, and the exploit has been publicly disclosed. However, the vendor did not respond to early disclosure. This vulnerability has a medium severity level and requires immediate attention from defenders responsible for ag2ai ag2 deployments to assess exposure and prioritize verification of affected versions.

Vendor
ag2ai
Product
ag2
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-11
Original CVE updated
2026-10-11
Advisory published
2026-10-11
Advisory updated
2026-10-11

Who should care

Defenders responsible for ag2ai ag2 deployments should assess exposure and prioritize verification of affected versions. They should also review and restrict access to the UserProxyAgent component, monitor for suspicious activity related to ag2ai ag2, and consider upgrading to a non-affected version if available. This includes verifying potential exposure to path traversal attacks, assessing and restricting access to the UserProxyAgent component, and and

Why it matters

CVE-2026-108543 is a medium-severity vulnerability in ag2ai ag2 that allows for remote path traversal attacks. Defenders should verify exposure, restrict access to affected components, and monitor for suspicious activity.

  • Verify potential exposure to path traversal attacks
  • Assess and restrict access to the UserProxyAgent component
  • Monitor for suspicious activity related to ag2ai ag2
  • Consider upgrading to a non-affected version if available

Technical summary

The vulnerability affects ag2ai ag2 up to version 0.13.4, specifically the UserProxyAgent component's use of os.path.join, allowing for path traversal attacks. The attack can be carried out remotely, and the exploit has been publicly disclosed. The CVE Program record and NVD vulnerability detail provide official information on the vulnerability. Supplemental sources, including VulDB entries and a GitHub exploit report, offer additional context. Defenders should prioritize verifying the affected versions of ag2ai ag2 and assessing exposure in their environments.

Defensive priority

Defenders should prioritize verifying the affected versions of ag2ai ag2 and assessing exposure in their environments.

Recommended defensive actions

  • Verify the version of ag2ai ag2 in use and assess exposure
  • Review and restrict access to the UserProxyAgent component
  • Monitor for potential path traversal attacks
  • Consider upgrading to a version beyond 0.13.4 if available
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE Program record and NVD vulnerability detail provide official information on the vulnerability. Supplemental sources, including VulDB entries and a GitHub exploit report, offer additional context.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-108543 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-108543

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-108543 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-108543

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • ag2ai ag2 UserProxyAgent os.path.join path traversal

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/108xxx/CVE-2026-108543.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/vuln/416198

    Supplemental source - vdb-entry, technical-description

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/vuln/416198/cti

    Supplemental source - signature, permissions-required

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/cve/CVE-2026-108543

    Supplemental source - third-party-advisory

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/submit/953877

    Supplemental source - third-party-advisory

  • Source reference

    Unverified legacy reference

    URL: https://github.com/Ruoyyy/My_vulnerable/blob/main/report_legacy_filename_dockerenv_en.md

    Supplemental source - exploit

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.