CVE-2026-126087: OpenJD Sessions code execution in launcher

Summary

An attacker with permission to submit jobs to a queue can run arbitrary code as the worker agent's OS user on Linux, and can obtain the AWS credentials the worker agent holds, in software including OpenJD Sessions for Python and the AWS Deadline Cloud worker agent. The attack is carried out remotely over the network, but it requires the attacker to have a valid login with low privileges, which is job submission permission on the queue.

Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.

Read the original description

Untrusted search path in the cross-user process launcher in Open Job Description (OpenJD) Sessions for Python before 0.11.0, as used in the AWS Deadline Cloud worker agent before 0.33.0, on Linux might allow an authenticated remote user with permission to submit jobs to a queue to execute arbitrary code as the worker agent OS user and obtain the AWS credentials held by the worker agent via a crafted job that modifies the PATH environment variable.

To remediate this issue, users of customer-managed fleets should upgrade the Deadline Cloud worker agent to version 0.33.0 or later, which includes OpenJD Sessions 0.11.0. Service-managed fleets were remediated service-side.

cve.now Index

12Pcve.now Index 12 of 100 · methodology v3 · provisional

Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
Exposure3/25Reachable over the network · Unknown: No advisory context yet
Reach?/20Unknown. No tracked technology or package matched
Severity8.8/10CVSS 8.8
No patch0/5No signal

What would change the score

Would score about 67 if added to CISA KEV
Would score about 62 if CISA's SSVC rates exploitation active
Would score about 31 if advisories confirm default setups are exposed

How the score works · Rankings

What to do

Upgrade to a fixed version: openjd-sessions 0.11.0 · deadline-cloud-worker-agent 0.33.0.

Check your systems with an agent

Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.

Check whether my systems are affected by CVE-2026-126087 (Untrusted search path in the cross-user process launcher in OpenJD Sessions for Python, as used in the AWS Deadline Cloud worker agent), using the cve.now data below.

Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.

What cve.now has for CVE-2026-126087 (entry last updated 2026-11-10):
Affected:
- AWS openjd-sessions: fixed in 0.11.0
- AWS deadline-cloud-worker-agent: fixed in 0.33.0
Fixed versions: 0.11.0, 0.33.0.
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
CISA KEV: CVE-2026-126087 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-126087 only. If you also check another CVE, look up its own KEV status; never assume it from this one.

How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.

Verify against the linked advisories before concluding, and cite the date you read each one:
- https://aws.amazon.com/security/security-bulletins/2026-177-aws/
- https://github.com/aws-deadline/deadline-cloud-worker-agent/releases/tag/0.33.0
- https://github.com/OpenJobDescription/openjd-sessions-for-python/releases/tag/0.11.0
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.

Entry: https://cve.now/CVE-2026-126087
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example get_vulnerability with id CVE-2026-126087.

Timeline

Nov 10, 2026, 6:49 PM UTCCVE published
Nov 10, 2026, 8:54 PM UTCFirst seen by cve.now

Affected versions

AWS openjd-sessions
fixed in 0.11.0
AWS deadline-cloud-worker-agent
fixed in 0.33.0

Evidence 5

CVE record · 2

Establishes: The identifier and description.

Record
CVE List · CVE-2026-126087
Record
NVD · CVE-2026-126087

Corrections

None so far.

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Questions about CVE-2026-126087

Is CVE-2026-126087 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data

Which versions are affected by CVE-2026-126087?

openjd-sessions: before 0.11.0. deadline-cloud-worker-agent: before 0.33.0.Source: cve.now feed data

How do I fix CVE-2026-126087?

Upgrade to a fixed version: openjd-sessions 0.11.0 · deadline-cloud-worker-agent 0.33.0.Source: cve.now feed data

Untrusted search path in the cross-user process launcher in OpenJD Sessions for Python, as used in the AWS Deadline Cloud worker agent