tarfile.extractall() with the 'data' or 'tar' filter could be bypassed by a crafted archive where a hardlink references a symlink stored at a deeper name than the hardlink itself. The extraction fallback validated the symlink at it's archived location but recreated it at the hardlink's shallower path, letting a relative target the filter judged contained escape the destination directory. This allowed a malicious tar archive to create a symlink pointing outside the destination, enabling out-of-destination file reads or writes. This was an incomplete fix of CVE-2025-4330.
CVE-2026-11940
“—” beside the score: it is equal to the CVSS score beside it.
This high-severity CVE scores 7.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.8% (54th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2026-38490 (ENISA EUVD) · GHSA-9mc4-rqmq-h467 (GitHub Security Advisories)Source: ENISA EUVD
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.8
- EG Score
- 7.8HIGHmedium confidence
- EG Risk
- 50EG Risk 50/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity78% × 45%Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.8% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.8%
- EPSS %ILE
- 54th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
- EG Likelihood
- 0.8% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
June 23, 2026
Last Modified
October 26, 2026
Advisory Details (3)
Auto-updated Jun 23, 2026Mailman 3 [CVE-2026-11940] tarfile extraction filter bypass allows escaping the destination directory - Security-announce - python.org
https://mail.python.org/archives/list/security-announce@python.org/thread/LD6QIISNQFQYOIEPJNEUIPV7S3V76FZH/gh-151558: Fix symlink escape via `tarfile` hardlink-extraction fallback
Fix merged in python/cpython PR #151559 on 2026-06-23 — awaiting tagged release
https://github.com/python/cpython/pull/151559`tarfile.extractall(filter='data')` allows symlink escape through hardlink-extraction fallback · Issue #151558 · python/cpython · GitHub
https://github.com/python/cpython/issues/151558Vendor Advisories for CVE-2026-11940(20)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:92452Red Hat Product SecurityCritical
Red Hat Security Advisory: Red Hat Enterprise Linux AI 3.5.2 enhancement update
- RHSA-2026:92449Red Hat Product SecurityCritical
Red Hat Security Advisory: Red Hat Enterprise Linux AI 3.5.2 enhancement update
- RHSA-2026:82415Red Hat Product SecurityCritical
Red Hat Security Advisory: Red Hat AI Inference 3.5.2 (cpu)
- RHSA-2026:82371Red Hat Product SecurityCritical
Red Hat Security Advisory: Red Hat AI Inference 3.5.2 (spyre)
- RHSA-2026:82368Red Hat Product SecurityCritical
Red Hat Security Advisory: Red Hat AI Inference 3.5.2 (cuda)
- RHSA-2026:82066Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat AI Inference Model Optimization Tools 3.5.2 (CUDA)
- RHSA-2026:82061Red Hat Product SecurityCritical
Red Hat Security Advisory: Red Hat AI Inference Tech Preview 3.5.2 (Gaudi)
- RHSA-2026:82059Red Hat Product SecurityCritical
Red Hat Security Advisory: Red Hat AI Inference 3.5.2 (ROCm)
- +12 more
Patch Availability(30)
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(12 across 8 ecosystems)
Debian:14(3)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| pypy3 | 7.3.19+dfsg-2 ... 7.3.23+dfsg-2 (12 versions) |
| — |
| python3.13 | 3.13.11-1 ... 3.13.9-1 (8 versions) |
| — |
| python3.14 | 3.14.0-1 ... 3.14.6-1 (24 versions) |
| — |
Debian:11(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python2.7 | 2.7.18-10 ... 2.7.18-9 (10 versions) |
| — |
| python3.9 | 3.9.10-1 ... 3.9.9-4 (29 versions) |
| — |
Debian:13(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| pypy3 | 7.3.19+dfsg-2 ... 8.0.0+dfsg-1 (13 versions) |
| — |
| python3.13 | 3.13.5-2, 3.13.5-2+deb13u1, 3.13.5-2+deb13u2, 3.13.5-2+deb13u3, 3.13.5-2+deb13u4 |
| — |
Alpine:v3.21(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.22(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.23(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Alpine:v3.24(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3 | — |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python3.11 | 3.11.2-6 ... 3.11.9-1 (28 versions) |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(25)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
- Red HatRHSA-2026:38017IMPORTANT2026-06-23
RHSA-2026:38017 — Important
- Red HatRHSA-2026:38018IMPORTANT2026-06-23
RHSA-2026:38018 — Important
- Red HatRHSA-2026:38090IMPORTANT2026-06-23
RHSA-2026:38090 — Important
- Red HatRHSA-2026:38091IMPORTANT2026-06-23
RHSA-2026:38091 — Important
- Red HatRHSA-2026:54268IMPORTANT2026-06-23
RHSA-2026:54268 — Important
- Red HatRHSA-2026:54534IMPORTANT2026-06-23
RHSA-2026:54534 — Important
- Red HatRHSA-2026:54554IMPORTANT2026-06-23
RHSA-2026:54554 — Important
- Red HatRHSA-2026:54760IMPORTANT2026-06-23
RHSA-2026:54760 — Important
- Red HatRHSA-2026:56219IMPORTANT2026-06-23
RHSA-2026:56219 — Important
- Red HatRHSA-2026:58901IMPORTANT2026-06-23
RHSA-2026:58901 — Important
- Red HatRHSA-2026:58902IMPORTANT2026-06-23
RHSA-2026:58902 — Important
- Red HatRHSA-2026:58928IMPORTANT2026-06-23
RHSA-2026:58928 — Important
- Red HatRHSA-2026:58971IMPORTANT2026-06-23
RHSA-2026:58971 — Important
- Red HatRHSA-2026:58981IMPORTANT2026-06-23
RHSA-2026:58981 — Important
- Red HatRHSA-2026:59009IMPORTANT2026-06-23
RHSA-2026:59009 — Important
- Red HatRHSA-2026:62809IMPORTANT2026-06-23
RHSA-2026:62809 — Important
- Red HatRHSA-2026:63024IMPORTANT2026-06-23
RHSA-2026:63024 — Important
- Red HatRHSA-2026:63117IMPORTANT2026-06-23
RHSA-2026:63117 — Important
- Red HatRHSA-2026:64806IMPORTANT2026-06-23
RHSA-2026:64806 — Important
- Red HatRHSA-2026:64816IMPORTANT2026-06-23
RHSA-2026:64816 — Important
- Red HatRHSA-2026:66018IMPORTANT2026-06-23
RHSA-2026:66018 — Important
- Red HatRHSA-2026:73859IMPORTANT2026-06-23
RHSA-2026:73859 — Important
- Red HatRHSA-2026:73909IMPORTANT2026-06-23
RHSA-2026:73909 — Important
- Red HatRHSA-2026:73929IMPORTANT2026-06-23
RHSA-2026:73929 — Important
- Red HatRHSA-2026:73930IMPORTANT2026-06-23
RHSA-2026:73930 — Important
Data Freshness Timeline
(refreshed 10× in last 7d / 47× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 100 of 312 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 212 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-27 20:45 UTCEG score recompute
- 2026-10-27 20:45 UTCVendor advisory
- 2026-10-27 20:45 UTCGHSA enrichmentGHSA-9mc4-rqmq-h467 · GitHub severity HIGH
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-26 11:28 UTCEG score recompute
- 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-25 14:50 UTCEG score recompute
- 2026-10-24 17:56 UTCEG score recompute
- 2026-10-24 17:56 UTCVendor advisory
- 2026-10-24 17:56 UTCGHSA enrichmentGHSA-9mc4-rqmq-h467 · GitHub severity HIGH
- 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-18 05:04 UTCEG score recompute
- 2026-10-17 18:58 UTCEG score recompute
Show 75 moreShow fewer
- 2026-10-17 18:58 UTCVendor advisory
- 2026-10-17 18:58 UTCGHSA enrichmentGHSA-9mc4-rqmq-h467 · GitHub severity HIGH
- 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.8% · 54th percentile
- 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-10-12 16:37 UTCEG score recompute
- 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-10-11 20:12 UTCEG score recompute
- 2026-10-11 18:25 UTCEG score recompute
- 2026-10-11 14:58 UTCEG score recompute
- 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-10-08 04:24 UTCOSV refresh
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-09-18 10:28 UTCEG score recompute
- 2026-09-18 10:28 UTCVendor advisory
- 2026-09-18 10:28 UTCGHSA enrichmentGHSA-9mc4-rqmq-h467 · GitHub severity HIGH
- 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-09-14 02:06 UTCEG score recompute
- 2026-09-14 02:06 UTCVendor advisory
- 2026-09-14 02:06 UTCGHSA enrichmentGHSA-9mc4-rqmq-h467 · GitHub severity HIGH
- 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-09-13 12:22 UTCEG score recompute
- 2026-09-13 12:22 UTCVendor advisory
- 2026-09-13 12:22 UTCGHSA enrichmentGHSA-9mc4-rqmq-h467 · GitHub severity HIGH
- 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-08-30 20:26 UTCEG score recompute
- 2026-08-30 20:26 UTCVendor advisory
- 2026-08-30 20:26 UTCGHSA enrichmentGHSA-9mc4-rqmq-h467 · GitHub severity HIGH
- 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.8% · 51st percentile
- 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.8% · 51st percentile
- 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-08-24 22:12 UTCEG score recompute
- 2026-08-24 22:12 UTCVendor advisory
- 2026-08-24 22:12 UTCGHSA enrichmentGHSA-9mc4-rqmq-h467 · GitHub severity HIGH
- 2026-08-24 04:56 UTCVendor advisory
- 2026-08-24 04:56 UTCGHSA enrichmentGHSA-9mc4-rqmq-h467 · GitHub severity HIGH
- 2026-08-23 14:07 UTCVendor advisory
- 2026-08-23 14:07 UTCGHSA enrichmentGHSA-9mc4-rqmq-h467 · GitHub severity HIGH
- 2026-08-23 02:07 UTCEG score recompute
- 2026-08-23 02:07 UTCVendor advisory
- 2026-08-23 02:07 UTCGHSA enrichmentGHSA-9mc4-rqmq-h467 · GitHub severity HIGH
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
- 2026-08-22 13:54 UTCEG score recompute
- 2026-08-22 13:54 UTCVendor advisory
- 2026-08-22 13:54 UTCGHSA enrichmentGHSA-9mc4-rqmq-h467 · GitHub severity HIGH
- 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownDebian:14:python3.14 · Alpine:v3.21:python3
Same vendor
10 shownredhat:RHSA-2026:58981 · redhat:RHSA-2026:38017
Frequently asked(5)
What is CVE-2026-11940?
When was the CVE record for CVE-2026-11940 published?
Is CVE-2026-11940 actively exploited?
What is the CVSS score of CVE-2026-11940?
How do I remediate CVE-2026-11940?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-11940
Is Your Infrastructure Affected by CVE-2026-11940?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.