CVE-2026-82447

HIGHPre-NVD 8.88.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-29. The CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 8.8Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

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
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100

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 (value × EchelonGraph’s weight)
Severity88% × 45%
The EG Score, 8.8 of 10.
Exploitation0.8% × 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: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.8%
EPSS %ILE
54th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

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.

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

August 29, 2026

Last Modified

September 24, 2026

Advisory Details (5)

Auto-updated Aug 29, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
Web page

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
Web page

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
Web page

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
Web page

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 20× in last 7d / 113× 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 99 of 179 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 80 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  2. 2026-10-13 06:03 UTCEG score recompute
  3. 2026-10-13 06:03 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  4. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  5. 2026-10-12 14:55 UTCEG score recompute
  6. 2026-10-11 19:19 UTCEG score recompute
  7. 2026-10-11 16:36 UTCEG score recompute
  8. 2026-10-11 13:54 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  11. 2026-10-10 11:55 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  12. 2026-10-10 00:45 UTCEG score recompute
  13. 2026-10-10 00:45 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  14. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  15. 2026-10-09 02:35 UTCEG score recompute
  16. 2026-10-09 02:35 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  17. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  18. 2026-10-08 00:46 UTCEG score recompute
  19. 2026-10-08 00:46 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  20. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  21. 2026-10-07 10:12 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  22. 2026-10-06 23:03 UTCEG score recompute
  23. 2026-10-06 23:03 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  24. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  25. 2026-10-06 11:55 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
Show 74 more
  1. 2026-10-06 00:47 UTCEG score recompute
  2. 2026-10-06 00:47 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  3. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  4. 2026-10-05 13:28 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  5. 2026-10-05 02:20 UTCEG score recompute
  6. 2026-10-05 02:20 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  7. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  8. 2026-10-04 14:55 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  9. 2026-10-04 03:46 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  10. 2026-10-03 16:38 UTCEG score recompute
  11. 2026-10-03 16:38 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  12. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  13. 2026-10-03 05:30 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  14. 2026-10-02 18:21 UTCEG score recompute
  15. 2026-10-02 18:21 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  16. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  17. 2026-10-02 06:55 UTCEG score recompute
  18. 2026-10-02 06:55 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  20. 2026-10-01 19:48 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  21. 2026-10-01 06:56 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  22. 2026-09-30 19:48 UTCEG score recompute
  23. 2026-09-30 19:48 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  24. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  25. 2026-09-30 03:48 UTCEG score recompute
  26. 2026-09-30 03:48 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  27. 2026-09-29 14:58 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  28. 2026-09-29 03:42 UTCEG score recompute
  29. 2026-09-29 03:42 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  30. 2026-09-28 16:21 UTCEG score recompute
  31. 2026-09-28 16:21 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  32. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  33. 2026-09-28 04:58 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  34. 2026-09-27 17:50 UTCEG score recompute
  35. 2026-09-27 17:50 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  36. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  37. 2026-09-27 06:42 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  38. 2026-09-26 19:18 UTCEG score recompute
  39. 2026-09-26 19:18 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  40. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  41. 2026-09-26 08:01 UTCEG score recompute
  42. 2026-09-26 08:01 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  43. 2026-09-25 13:13 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  44. 2026-09-25 02:05 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  45. 2026-09-24 14:56 UTCEG score recompute
  46. 2026-09-24 14:56 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  47. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  48. 2026-09-24 04:33 UTCEG score recompute
  49. 2026-09-24 04:33 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  50. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  51. 2026-09-23 17:24 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  52. 2026-09-23 13:51 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  53. 2026-09-23 02:42 UTCEG score recompute
  54. 2026-09-23 02:42 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  55. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  56. 2026-09-22 15:33 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  57. 2026-09-22 04:26 UTCEG score recompute
  58. 2026-09-22 04:26 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  59. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  60. 2026-09-21 17:17 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  61. 2026-09-21 05:38 UTCEG score recompute
  62. 2026-09-21 05:38 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  63. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  64. 2026-09-20 18:29 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  65. 2026-09-20 07:20 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  66. 2026-09-19 19:55 UTCEG score recompute
  67. 2026-09-19 19:55 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  68. 2026-09-19 08:45 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  69. 2026-09-18 21:27 UTCEG score recompute
  70. 2026-09-18 21:27 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  71. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  72. 2026-09-18 09:08 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8
  73. 2026-09-17 22:00 UTCEG score recompute
  74. 2026-09-17 22:00 UTCGHSA enrichmentGHSA-57gg-9j2p-5v4x · GitHub severity HIGH · GitHub CVSS 8.8

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-82447?
CVE-2026-82447 is a high-severity vulnerability; its CVE record was 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 made public?
CVE-2026-82447 was made public on July 6, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 29, 2026. EchelonGraph's copy of the record carries a last-modified date of September 24, 2026; the record at its source may have been updated since.
Is CVE-2026-82447 actively exploited?
CVE-2026-82447 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-82447?
CVE-2026-82447 has a CVSS base score of 8.8 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-82447?
An upstream fix for CVE-2026-82447 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-82447 are linked in the Vendor Advisories panel on this page.

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