A flaw was found in ansible-runner. The unstream_dir() function, which receives and extracts a streamed zip archive on the worker side of the ansible-runner transmit/worker protocol, re-creates symbolic links from archive content without validating the link target and applies chmod() and utime() to an unsanitized filesystem path derived from the archive member name. A crafted archive processed by a worker that consumes attacker-influenced input can create files, create symbolic links, or change permissions outside the intended target directory, which can be leveraged toward code execution.
CVE-2026-103754
MEDIUMPre-NVD 5.95.9—Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
Score 5.9 from GitHub Security Advisory published 2026-10-01. A secondary CVSS source baseline 5.9; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.9Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 5.9
- EG Score
- 5.9MEDIUMhigh confidence
- EG Risk
- 27EG Risk 27/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity59% × 45%Exploitation0% × 40%Automatability0% × 15%CISA SSVC: Track at every mission impact level.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.3%
- EPSS %ILE
- 24th
- KEV
- Not listed
CISA SSVCTrack at every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 1, 2026
Last Modified
October 1, 2026
Advisory Details (3)
Auto-updated Oct 1, 2026Patch available. Sources: redhat, github_pr.
github_pr
fix: reject escaping members and unsafe symlink targets in unstream_dir
Upstream fix in progress (PR #1550 · ansible/ansible-runner, state=open)
https://github.com/ansible/ansible-runner/pull/1550redhat
2544510 – (CVE-2026-103754) CVE-2026-103754 ansible-runner: ansible-runner: path traversal and symlink escape in unstream_dir() allows file write outside the target directory
https://bugzilla.redhat.com/show_bug.cgi?id=2544510redhat Patch Available
CVE-2026-103754 - Red Hat Customer Portal
Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a
https://access.redhat.com/security/cve/CVE-2026-103754Vendor Advisories for CVE-2026-103754(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 19× in last 7d / 19× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-10-04 14:56 UTCGHSA enrichment
- 2026-10-03 16:07 UTCEG score recompute
- 2026-10-03 16:07 UTCGHSA enrichment
- 2026-10-03 14:25 UTCEPSS rescore
- 2026-10-02 17:19 UTCEG score recompute
- 2026-10-02 17:19 UTCGHSA enrichment
- 2026-10-01 18:31 UTCEG score recompute
- 2026-10-01 18:30 UTCGHSA enrichment
- 2026-10-01 17:21 UTCEG score recompute
- 2026-10-01 17:21 UTCGHSA enrichment
- 2026-10-01 14:20 UTCEG score recompute
- 2026-10-01 14:20 UTCGHSA enrichment
- 2026-10-01 13:31 UTCEG score recompute
- 2026-10-01 13:31 UTCGHSA enrichment
- 2026-10-01 12:48 UTCEG score recompute
- 2026-10-01 12:48 UTCGHSA enrichment
- 2026-10-01 12:28 UTCEG score recompute
- 2026-10-01 12:01 UTCEG score recompute
- 2026-10-01 12:00 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-103754?
CVE-2026-103754 is a medium vulnerability published on October 1, 2026. A flaw was found in ansible-runner. The unstream_dir() function, which receives and extracts a streamed zip archive on the worker side of the ansible-runner transmit/worker protocol, re-creates symbolic links from archive content without validating the link target and applies chmod() and utime() to…
When was CVE-2026-103754 disclosed?
CVE-2026-103754 was first published on October 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-103754 actively exploited?
CVE-2026-103754 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (24th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-103754?
CVE-2026-103754 has a CVSS base score of 5.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-103754?
A fix for CVE-2026-103754 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-103754 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-103754
Is Your Infrastructure Affected by CVE-2026-103754?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.