Which products and versions are affected by CVE-2025-49619?

Affected: Skyvern (pypi). The full list is in the CVE brief.

Is CVE-2025-49619 being exploited in the wild?

It is exploited in the wild, listed in Industry KEV feed since Dec 27, 2025.

Is CVE-2025-49619 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2025-49619?

Public exploit code is available.

Is there a fix for CVE-2025-49619?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2025-49619 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Request A Demo

Emerging threatsHigh

CVE-2025-49619Skyvern Vulnerability

Skyvern has a Jinja runtime leak

Published Jun 7, 2025 · Updated Aug 12, 2026 · Also known as GHSA-h92g-3xc3-ww2r, PYSEC-2026-1929

Key Facts

Patch immediately

CVE-2025-49619 is a high-severity vulnerability (CVSS 8.5 v3.1) affecting Skyvern (pypi).
It is exploited in the wild, listed in Industry KEV feed since Dec 27, 2025. Public exploit code is available.
EPSS estimates a 20% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Scores

CVSS v3.1

8.5

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

EPSS (30-day exploit likelihood)

20%

Higher than 97.4% of all scored CVEs

Exploit maturity

Weaponized

ATLAS score

50/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Dec 27, 2025

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Weaponized

Public exploit code

Proof-of-concept links

In-the-wild evidence

Reports of active use

Advisories And Exploit References

advisoryhttps://www.cve.org/CVERecord?id=CVE-2025-49619
advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2025-49619
advisoryGHSA advisory

Description

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).

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
Industry KEV feed	Dec 27, 2025	n/a	Not reported

Affected Products

2 affected entries in total

Product	Affected versions	Fixed in
Skyvernpypi	See advisory	n/a

Timeline

Publicly disclosed
Jun 7, 2025
Added to Industry KEV feed
Dec 27, 2025
Last updated
Aug 12, 2026

Weakness Type

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

References

advisorycve.org · CVERecord
advisorynvd.nist.gov · CVE-2025-49619
advisoryGHSA advisory
exploitVulnCheck exploitation report
exploitMSF skyvern_ssti_cve_2025_49619.rb

8 more references in the full CVE brief

FAQ

Common Questions.

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.
Affected: Skyvern (pypi). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Dec 27, 2025.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Is CVE-2025-49619 On Your Attack Surface?

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.