VulnerabilityPublished 6 May 2026

CVE-2026-33154: python-dynaconf vulnerability

Affects python-dynaconfSource GCVE Database

Not known to be exploited · fixed in 3.1.7-1ubuntu0.1~esm1 : patch python-dynaconf soon.

Data as of 27 Oct 2026, 01:58 UTC

Severity

High

Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Patch: Available – fixed in 3.1.7-1ubuntu0.1~esm1, 3.1.7-2ubuntu0.24.04.1, 3.1.7-2ubuntu0.25.10.1 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 6 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

usn-8231-1

What to do

Upgrade to a fixed release listed under Affected software.

Patches and advisories

ubuntu.com/security/notices/USN-8231-1 (opens in a new tab)

Affected software

Product	Affected	Fixed in
Ubuntu Pro 26.04 LTSpython-dynaconf`pkg:deb/ubuntu/python-dynaconf?arch=source&distro=esm-apps/resolute`Other threats	Affected <3.2.12-1ubuntu0.1~esm1	Fixed in 3.2.12-1ubuntu0.1~esm1
Ubuntu 25.10python-dynaconf`pkg:deb/ubuntu/python-dynaconf?arch=source&distro=questing`Other threats	Affected <3.1.7-2ubuntu0.25.10.1	Fixed in 3.1.7-2ubuntu0.25.10.1
Ubuntu 24.04 LTSpython-dynaconf`pkg:deb/ubuntu/python-dynaconf?arch=source&distro=noble`Other threats	Affected <3.1.7-2ubuntu0.24.04.1	Fixed in 3.1.7-2ubuntu0.24.04.1
Ubuntu Pro 22.04 LTSpython-dynaconf`pkg:deb/ubuntu/python-dynaconf?arch=source&distro=esm-apps/jammy`Other threats	Affected <3.1.7-1ubuntu0.1~esm1	Fixed in 3.1.7-1ubuntu0.1~esm1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available and users should update their python-dynaconf packages to the patched versions provided by Ubuntu. For Ubuntu 22.04 LTS, 24.04 LTS, 25.10, and 26.04 LTS, the fixed package versions are 3.1.7-1ubuntu0.1~esm1, 3.1.7-2ubuntu0.24.04.1, 3.1.7-2ubuntu0.25.10.1, and 3.2.12-1ubuntu0.1~esm1 respectively. Standard system updates or Ubuntu Pro ESM Apps updates will apply these fixes. No additional mitigation steps are indicated by the vendor advisory.

Description

A vulnerability in python-dynaconf was discovered where the software incorrectly handles template evaluation in its string resolvers. This flaw could allow a remote attacker to execute arbitrary code on affected systems. The issue affects multiple Ubuntu package versions of python-dynaconf. Official patches have been released and are available through standard system updates or Ubuntu Pro Extended Security Maintenance (ESM) channels.

Impact

A remote attacker could exploit this vulnerability to execute arbitrary code on affected systems, potentially leading to full system compromise. The vulnerability arises from incorrect template evaluation in string resolvers within python-dynaconf. No known exploits in the wild have been reported at this time.

Summary

The python-dynaconf package contains a vulnerability (CVE-2026-33154) due to improper handling of template evaluation in its string resolvers. This flaw can be exploited remotely to execute arbitrary code. The vulnerability affects specific Ubuntu package versions of python-dynaconf, including versions prior to 3.1.7-1ubuntu0.1~esm1, 3.1.7-2ubuntu0.24.04.1, 3.1.7-2ubuntu0.25.10.1, and 3.2.12-1ubuntu0.1~esm1. Canonical has released fixed package versions for Ubuntu 22.04 LTS, 24.04 LTS, 25.10, and 26.04 LTS releases. Users are advised to update to these patched versions to remediate the vulnerability.

References

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