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Fencer Vulns
high 8.5

CVE-2025-49619 in the critical feed json

Skyvern has a Jinja runtime leak

published 2025-06-07 17 mo ago modified 2026-07-07 4 mo ago also GHSA-h92g-3xc3-ww2r , PYSEC-2026-1929 , EUVD-2025-17375

cvss
8.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
21.8%
EPSS 21.8% chance of exploitation in 30 days, percentile 97%
public exploits
2
Metasploit, Exploit-DB

Summary

Skyvern through 0.1.85 is vulnerable to server-side template injection (SSTI) in the Prompt field of workflow blocks such as the Navigation v2 Block. Improper sanitization of Jinja2 template input allows authenticated users to inject crafted expressions that are evaluated on the server, leading to blind remote code execution (RCE).

Patch / fix

Timeline

  1. Published
  2. First public exploit (Metasploit exploit/linux/http/skyvern_ssti_cve_2025_49619)

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
17 mo ago

Exploit prediction

21.81% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.1 8.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
OSV 3.1 8.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
GitHub 3.1 8.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Affected packages

ecosystem package affected fixed in
pypi skyvern
<=0.2.0
 no fix listed

Affected products

  • Skyvern Skyvern

Classification

Weakness
  • CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.