A code execution flaw was found in Emacs, affecting versions prior to 31.2. The Flymake mode using language backends other than Lisp would execute arbitrary code from the edited file while performing syntax checking. Viewing or editing untrusted files using Emacs could lead to arbitrary code execution with the privileges of the user running Emacs.
CVE-2026-96442
“—” beside the score: it is equal to the CVSS score beside it.
Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-23. The CNA's CVSS baseline 7.8; sources differ by 0.0.
Also known asEUVD-2026-85187 (ENISA EUVD) · GHSA-hmfx-447r-rwh3 (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
- 35EG Risk 35/100
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.Exploitation0.2% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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. - EPSS PROB
- 0.2%
- EPSS %ILE
- 10th
- 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.GitHub Security Advisory CVSS
- EG Likelihood
- 0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). 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; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade 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; Track* at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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; Fix on system upgrade if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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
September 23, 2026
Last Modified
November 2, 2026
Advisory Details (4)
Auto-updated Sep 23, 2026oss-security - Emacs arbitrary code execution: incomplete fix for CVE-2024-53920
https://www.openwall.com/lists/oss-security/2026/09/14/1commit abc802ee2eb0 (emacs-mirror/emacs)
Fix landed in emacs-mirror/emacs commit abc802ee2eb0 — awaiting tagged release
https://github.com/emacs-mirror/emacs/commit/abc802ee2eb0b1663349ddf22a461f8e54a383fbcommit 135e6f63f08f (emacs-mirror/emacs)
Fix landed in emacs-mirror/emacs commit 135e6f63f08f — awaiting tagged release
https://github.com/emacs-mirror/emacs/commit/135e6f63f08fee3d374fa1a5187bce941a2d3e3c2537347 – (CVE-2026-96442) CVE-2026-96442 emacs: Emacs: arbitrary code execution, incomplete fix for CVE-2024-53920
https://bugzilla.redhat.com/show_bug.cgi?id=2537347Vendor Advisories for CVE-2026-96442(5)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:90800Red Hat Product SecurityHigh
Red Hat Security Advisory: emacs security update
- RHSA-2026:85245Red Hat Product SecurityHigh
Red Hat Security Advisory: emacs security update
- RHSA-2026:84591Red Hat Product SecurityHigh
Red Hat Security Advisory: emacs security update
- CVE-2026-96442Microsoft Security Response Center (MSRC)High
Emacs: emacs: arbitrary code execution in flymake mode
- GHSA-hmfx-447r-rwh3GitHub Security AdvisoriesHigh
A code execution flaw was found in Emacs, affecting versions prior to 31.2. The Flymake mode...
Patch Availability(3)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | emacs-1:26.1-15.el8_10.4 | 2026-10-27 | redhat |
| redhat | emacs-1:29.4-14.el10_2.3 | 2026-10-19 | redhat |
| redhat | emacs-1:27.2-18.el9_8.3 | 2026-10-19 | redhat |
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
(3 across 3 ecosystems)
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| emacs | 1:28.2+1-15 ... 1:30.2+1-9 (53 versions) |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| emacs | 1:30.1+1-6 ... 1:30.2+1-9 (16 versions) |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| emacs | 1:30.1+1-6 ... 1:30.2+1-9 (15 versions) |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 16× in last 7d / 100× 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 158 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 58 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-11-02 11:42 UTCEG score recompute
- 2026-11-02 11:42 UTCVendor advisory
- 2026-11-02 11:42 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 9th percentile
- 2026-10-27 22:28 UTCEG score recompute
- 2026-10-27 22:28 UTCVendor advisory
- 2026-10-27 22:27 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-27 21:59 UTCEG score recompute
- 2026-10-27 21:59 UTCVendor advisory
- 2026-10-27 21:59 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-27 16:33 UTCEPSS rescoreEPSS 0.2% · 9th percentile
- 2026-10-26 16:33 UTCEPSS rescoreEPSS 0.2% · 9th percentile
- 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.2% · 9th percentile
- 2026-10-25 13:48 UTCEG score recompute
- 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-23 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-23 12:34 UTCEG score recompute
- 2026-10-23 12:34 UTCVendor advisory
- 2026-10-23 12:33 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 5th percentile
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- 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-20 00:25 UTCEG score recompute
- 2026-10-20 00:25 UTCVendor advisory
- 2026-10-20 00:25 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-19 23:18 UTCEG score recompute
- 2026-10-19 23:18 UTCVendor advisory
- 2026-10-19 23:18 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-19 05:26 UTCEG score recompute
- 2026-10-19 05:26 UTCVendor advisory
- 2026-10-19 05:26 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-19 04:44 UTCEG score recompute
- 2026-10-19 04:44 UTCVendor advisory
- 2026-10-19 04:43 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-18 02:57 UTCEG score recompute
- 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-13 04:08 UTCEG score recompute
- 2026-10-13 04:08 UTCVendor advisory
- 2026-10-13 04:08 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-12 14:40 UTCEG score recompute
- 2026-10-11 21:33 UTCVendor advisory
- 2026-10-11 21:33 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-11 19:11 UTCEG score recompute
- 2026-10-11 16:27 UTCEG score recompute
- 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-11 13:39 UTCEG score recompute
- 2026-10-11 08:41 UTCEG score recompute
- 2026-10-11 08:41 UTCVendor advisory
- 2026-10-11 08:41 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-10 19:59 UTCVendor advisory
- 2026-10-10 19:59 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-10 07:19 UTCEG score recompute
- 2026-10-10 07:19 UTCVendor advisory
- 2026-10-10 07:19 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-09 18:38 UTCVendor advisory
- 2026-10-09 18:37 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-09 05:49 UTCVendor advisory
- 2026-10-09 05:49 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-08 17:09 UTCVendor advisory
- 2026-10-08 17:09 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-08 03:01 UTCEG score recompute
- 2026-10-08 03:01 UTCVendor advisory
- 2026-10-08 03:01 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-07 14:21 UTCVendor advisory
- 2026-10-07 14:21 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-07 01:12 UTCEG score recompute
- 2026-10-07 01:12 UTCVendor advisory
- 2026-10-07 01:12 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-06 15:19 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-06 12:32 UTCVendor advisory
- 2026-10-06 12:32 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-05 23:53 UTCEG score recompute
- 2026-10-05 23:53 UTCVendor advisory
- 2026-10-05 23:53 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-05 11:13 UTCEG score recompute
- 2026-10-05 11:13 UTCVendor advisory
- 2026-10-05 11:13 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-04 23:23 UTCEPSS rescoreEPSS 0.2% · 5th percentile
- 2026-10-04 22:33 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-04 09:54 UTCVendor advisory
- 2026-10-04 09:54 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-03 21:14 UTCEG score recompute
- 2026-10-03 21:14 UTCVendor advisory
- 2026-10-03 21:14 UTCGHSA enrichmentGHSA-hmfx-447r-rwh3 · GitHub severity HIGH · GitHub CVSS 7.8
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownDebian:12:emacs
- CVE-2024-53920NVD 7.8EG 9.8CRITICAL
- CVE-2024-39331EG 9.8CRITICAL
- CVE-2023-28617NVD 7.8EG 9.8CRITICAL
- CVE-2023-27986NVD 7.8EG 9.8CRITICAL
- CVE-2023-27985NVD 7.8EG 9.8CRITICAL
- CVE-2022-48339NVD 7.8EG 9.8CRITICAL
- CVE-2022-48338NVD 7.3EG 9.8CRITICAL
- CVE-2022-48337EG 9.8CRITICAL
- CVE-2025-1244EG 8.8HIGH
- CVE-2026-79992EG 7.8HIGH
Frequently asked(5)
What is CVE-2026-96442?
When was CVE-2026-96442 made public?
Is CVE-2026-96442 actively exploited?
What is the CVSS score of CVE-2026-96442?
How do I remediate CVE-2026-96442?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-96442
Is Your Infrastructure Affected by CVE-2026-96442?
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