CVE-2026-123870

critical

Description

The otterdog webapp evaluates a format-string built from the incoming GitHub webhook JSON body using Python's eval(). When the GITHUB_WEBHOOK_SECRET configuration value is unset or empty (the code default is None), the HMAC signature check is skipped entirely, allowing an unauthenticated network client to reach the eval() sink with attacker-controlled input and execute arbitrary Python on the webapp host.

References

https://gitlab.eclipse.org/security/cve-assignment/-/work_items/554

https://github.com/eclipse-csi/otterdog/security/advisories/GHSA-32xf-7j44-xq72

https://github.com/eclipse-csi/otterdog/commit/bbc9e3ced3665f09fc4632f11b5867524eda7f72

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-119883

Details

Source: Mitre, NVD

Published: 2026-11-09

Updated: 2026-11-12

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

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

Severity: Critical

CVSS v4

Base Score: 9.5

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Severity: Critical

EPSS

EPSS: 0.00302