A vulnerability has been found in vercel ai up to 3.0.97. Impacted is the function run of the file .github/workflows/prettier-on-automerge.yml of the component PR Branch Name Interpolation. The manipulation leads to os command injection. The attack can be initiated remotely. The complexity of an attack is rather high. The exploitability is considered difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
CVE-2026-8767
“—” beside the score: it is equal to NVD's CVSS score.
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 7.0% (94th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 5.0 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-05-18) is not newer than that change (2026-10-14), so it does not.
- CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.
The CVE record's description, written by its CNA (VulDB), states the affected versions: "A vulnerability has been found in vercel ai up to 3.0.97." No release containing a fix is confirmed on record.
- CVSS v3
- 7.5
- EG Score
- 7.5HIGHmedium 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)Severity75% × 45%Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.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 public PoC (CISA Vulnrichment) · Automatable no (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: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix. - EPSS PROB
- 7.0%
- EPSS %ILE
- 94th
- 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 (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
- EG Likelihood
- 7.0% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: 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).
No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (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
May 17, 2026
Last Modified
October 14, 2026
Advisory Details (1)
Auto-updated May 18, 2026Command Injection in `prettier-on-automerge.yml` via Unsafe PR Branch Name Interpolation · GitHub
https://gist.github.com/YLChen-007/870bd6966cd84703d91ce54dfea3bdd0Vendor Advisories for CVE-2026-8767(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 11× in last 7d / 33× 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 97 of 207 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. 3 repeat rows among the latest 100 are merged into the row they repeat. The 110 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-19 16:33 UTCEPSS rescoreEPSS 7.0% · 94th percentile
- 2026-10-18 16:33 UTCEPSS rescoreEPSS 7.0% · 94th percentile
- 2026-10-18 03:04 UTCEG score recompute
- 2026-10-17 16:35 UTCEPSS rescoreEPSS 7.0% · 94th percentile
- 2026-10-16 16:44 UTCEPSS rescoreEPSS 7.0% · 94th percentile
- 2026-10-15 16:33 UTCEPSS rescoreEPSS 7.0% · 94th percentile
- 2026-10-14 20:34 UTCEG score recompute▲ 2.50
- 2026-10-14 20:33 UTCGHSA enrichmentGHSA-9pj2-3x6v-c3pp · GitHub severity LOW · GitHub CVSS 5.0
- 2026-10-14 20:25 UTCNVD updateCVSS v3 → 7.5 · CVSS v4 → 1.3 · severity → HIGH
- 2026-10-14 16:34 UTCEPSS rescoreEPSS 7.0% · 94th percentile
- 2026-10-13 16:35 UTCEPSS rescoreEPSS 7.0% · 94th percentile
- 2026-10-12 16:35 UTCEPSS rescoreEPSS 7.0% · 94th percentile
- 2026-10-12 14:50 UTCEG score recompute
- 2026-10-11 19:16 UTCEG score recompute
- 2026-10-11 16:33 UTCEG score recompute
- 2026-10-11 13:50 UTCEPSS rescoreEPSS 7.0% · 94th percentile
- 2026-10-11 13:49 UTCEG score recompute
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 7.0% · 94th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 7.0% · 93rd percentile
- 2026-10-08 17:13 UTCEPSS rescoreEPSS 7.0% · 93rd percentile
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 7.0% · 93rd percentile
- 2026-10-06 15:18 UTCEPSS rescoreEPSS 7.0% · 93rd percentile
- 2026-10-05 17:44 UTCEPSS rescoreEPSS 7.0% · 93rd percentile
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 7.0% · 93rd percentile
- 2026-10-01 19:51 UTCEPSS rescoreEPSS 7.0% · 93rd percentile
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- 2026-09-30 15:04 UTCEPSS rescoreEPSS 7.0% · 93rd percentile
- 2026-09-28 13:52 UTCEPSS rescoreEPSS 7.0% · 93rd percentile
- 2026-09-27 13:49 UTCEPSS rescoreEPSS 7.0% · 93rd percentile
- 2026-09-26 15:59 UTCEPSS rescoreEPSS 7.0% · 93rd percentile
- 2026-09-24 14:04 UTCEPSS rescoreEPSS 7.0% · 93rd percentile
- 2026-09-23 17:54 UTCEPSS rescoreEPSS 5.1% · 91st percentile
- 2026-09-22 16:01 UTCEPSS rescoreEPSS 5.1% · 91st percentile
- 2026-09-21 21:09 UTCEPSS rescoreEPSS 5.1% · 92nd percentile
- 2026-09-18 19:28 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-17 19:32 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-16 14:09 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-15 03:12 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-12 15:02 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-11 14:53 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-11 09:38 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-08 22:01 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-06 13:48 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-05 15:31 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-04 05:07 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-02 14:12 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-01 13:54 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-01 04:40 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-30 19:18 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-30 01:22 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-28 21:42 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-27 14:25 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-26 14:47 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-25 13:49 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-24 14:18 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-23 17:18 UTCEG score recompute
- 2026-08-23 17:18 UTCGHSA enrichmentGHSA-9pj2-3x6v-c3pp · GitHub severity LOW · GitHub CVSS 5.0
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-22 00:45 UTCEG score recompute
- 2026-08-22 00:45 UTCGHSA enrichmentGHSA-9pj2-3x6v-c3pp · GitHub severity LOW · GitHub CVSS 5.0
- 2026-08-21 23:49 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-20 22:56 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-20 19:13 UTCEG score recompute
- 2026-08-20 19:13 UTCGHSA enrichmentGHSA-9pj2-3x6v-c3pp · GitHub severity LOW · GitHub CVSS 5.0
- 2026-08-19 17:04 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-18 13:49 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-17 13:47 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-17 10:09 UTCEG score recompute
- 2026-08-17 10:09 UTCGHSA enrichmentGHSA-9pj2-3x6v-c3pp · GitHub severity LOW · GitHub CVSS 5.0
- 2026-08-16 14:56 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-16 03:41 UTCEG score recompute
- 2026-08-16 03:41 UTCGHSA enrichmentGHSA-9pj2-3x6v-c3pp · GitHub severity LOW · GitHub CVSS 5.0
- 2026-08-16 02:15 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-15 01:31 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-14 02:14 UTCEG score recompute
- 2026-08-14 02:14 UTCGHSA enrichmentGHSA-9pj2-3x6v-c3pp · GitHub severity LOW · GitHub CVSS 5.0
- 2026-08-13 22:00 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-12 14:41 UTCEG score recompute
- 2026-08-12 14:41 UTCGHSA enrichmentGHSA-9pj2-3x6v-c3pp · GitHub severity LOW · GitHub CVSS 5.0
- 2026-08-12 13:51 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-11 13:43 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-11 07:21 UTCEG score recompute
- 2026-08-11 07:21 UTCGHSA enrichmentGHSA-9pj2-3x6v-c3pp · GitHub severity LOW · GitHub CVSS 5.0
- 2026-08-11 00:00 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-10 05:49 UTCGHSA enrichmentGHSA-9pj2-3x6v-c3pp · GitHub severity LOW · GitHub CVSS 5.0
- 2026-08-09 04:18 UTCEG score recompute
- 2026-08-09 04:18 UTCGHSA enrichmentGHSA-9pj2-3x6v-c3pp · GitHub severity LOW · GitHub CVSS 5.0
- 2026-08-08 16:37 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-08 02:46 UTCEG score recompute
- 2026-08-08 02:46 UTCGHSA enrichmentGHSA-9pj2-3x6v-c3pp · GitHub severity LOW · GitHub CVSS 5.0
- 2026-08-07 16:30 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-07 01:15 UTCEG score recompute
- 2026-08-07 01:15 UTCGHSA enrichmentGHSA-9pj2-3x6v-c3pp · GitHub severity LOW · GitHub CVSS 5.0
- 2026-08-06 13:47 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-05 21:27 UTCEG score recompute
- 2026-08-05 21:27 UTCGHSA enrichmentGHSA-9pj2-3x6v-c3pp · GitHub severity LOW · GitHub CVSS 5.0
- 2026-08-05 19:17 UTCEPSS rescoreEPSS 4.3% · 90th percentile
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Frequently asked(5)
What is CVE-2026-8767?
When was the CVE record for CVE-2026-8767 published?
Is CVE-2026-8767 actively exploited?
What is the CVSS score of CVE-2026-8767?
How do I remediate CVE-2026-8767?
Dependency Blast Radius
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