CVE-2026-82447

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-29. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Skyvern before 1.0.45 contains a sandbox escape vulnerability in TextPromptBlock that renders prompts twice, first through a sandboxed Jinja environment and then through an unsandboxed environment. Attackers can inject malicious Jinja template syntax through workflow parameters or upstream block output to execute arbitrary code with server process privileges.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

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 computed
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
—
EPSS %ILE
—
KEV
Not listed

Published

August 29, 2026

Last Modified

August 29, 2026

Advisory Details (5)

Auto-updated Aug 29, 2026
⚠️ Active exploitation confirmed. Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

Skyvern before 1.0.45 Sandbox Escape via TextPromptBlock | Advisories | VulnCheck

https://www.vulncheck.com/advisories/skyvern-before-1.0.45-sandbox-escape-via-textpromptblock
generic

skyvern/skyvern/forge/sdk/prompting.py at v1.0.44 · Skyvern-AI/skyvern · GitHub

https://github.com/Skyvern-AI/skyvern/blob/v1.0.44/skyvern/forge/sdk/prompting.py
generic

skyvern/skyvern/forge/sdk/workflow/models/block.py at v1.0.44 · Skyvern-AI/skyvern · GitHub

https://github.com/Skyvern-AI/skyvern/blob/v1.0.44/skyvern/forge/sdk/workflow/models/block.py
generic🔴 Active Exploitation

GitHub - Skyvern-AI/skyvern: Automate browser based workflows with AI · GitHub

https://github.com/Skyvern-AI/skyvern
github_commit

commit d723de621d5b (Skyvern-AI/skyvern)

Fix landed in Skyvern-AI/skyvern commit d723de621d5b — awaiting tagged release

https://github.com/Skyvern-AI/skyvern/commit/d723de621d5b3a340f3cc4d5b46bfe40a9a3124e

Vendor Advisories for CVE-2026-82447(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 5× in last 7d / 5× 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.

  1. 2026-08-30 00:33 UTCEG score recompute
  2. 2026-08-30 00:33 UTCGHSA enrichment
  3. 2026-08-29 13:23 UTCEG score recompute
  4. 2026-08-29 12:24 UTCEG score recompute
  5. 2026-08-29 12:22 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-82447?
CVE-2026-82447 is a high vulnerability published on August 29, 2026. Skyvern before 1.0.45 contains a sandbox escape vulnerability in TextPromptBlock that renders prompts twice, first through a sandboxed Jinja environment and then through an unsandboxed environment. Attackers can inject malicious Jinja template syntax through workflow parameters or upstream block…
When was CVE-2026-82447 disclosed?
CVE-2026-82447 was first published in the National Vulnerability Database on August 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-82447?
CVE-2026-82447 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-82447?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82447, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-82447

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