CVE-2026-109437: Cognition before 0.13.0 contains an unauthenticated remote code execution vulnerability due to defaulting its

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CRITICAL 9.8REMOTE

CVE-2026-109437 is a critical-severity flaw (CVSS 9.8) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cognition before 0.13.0 contains an unauthenticated remote code execution vulnerability due to defaulting its agent sandbox backend to local execution and shipping no authentication on its REST/SSE API. Attackers can create a session via POST /sessions and post a message via POST /sessions/{id}/messages without credentials, causing the Deep Agents ReAct loop to run attacker-directed shell commands through the local shell backend, resulting in rem

Why this priority

Critical severity
CISA SSVC: public proof of concept
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-306, CWE-1188
Published	2026-10-19
Last modified	2026-10-20

Publisher (CNA): VulnCheck

Last updated 2026-10-20 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-10-19 19:17 UTCPublished CVE record published
2026-10-20 17:17 UTCUpdated Record last modified

Exact fixes by distribution

Fedora 46 · mac · FIXED · 13.43-1.fc46 · FEDORA-2026-8fac5b22cf · source

sudo dnf upgrade --advisory=FEDORA-2026-8fac5b22cf

Fedora ELN · libdnf · FIXED · 0.76.0-2.eln159 · FEDORA-2026-dbd263e9d4 · source

sudo dnf upgrade --advisory=FEDORA-2026-dbd263e9d4

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-109437?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-109437 being exploited?

CVE-2026-109437 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-109437 affect?

CVE-2026-109437 affects affected software. Severity is critical (CVSS 9.8). Cognition before 0.13.0 contains an unauthenticated remote code execution vulnerability due to defaulting its agent sandbox backend to local execution and shipping no authentication on its REST/SSE API. Attackers can create a session via PO

How urgent is CVE-2026-109437?

Priority 56/100. Critical severity; CISA SSVC: public proof of concept; Remotely exploitable, no login, no user action

Software pages

React vulnerabilities

References

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