CVE-2026-123870

UNKNOWN 0.0

[Eclipse CSI - otterdog] Unauthenticated remote code execution via eval() on format-string-injected webhook body when GITHUB_WEBHOOK_SECRET is unset

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-95
Vendor	eclipse foundation
Product	otterdog
Published	Nov 9, 2026

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Affected Versions

Eclipse Foundation / otterdog

0.9.0 < 1.3.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

gitlab.eclipse.org: https://gitlab.eclipse.org/security/cve-assignment/-/work_items/554 github.com: https://github.com/eclipse-csi/otterdog/security/advisories/GHSA-32xf-7j44-xq72 github.com: https://github.com/eclipse-csi/otterdog/commit/bbc9e3ced3665f09fc4632f11b5867524eda7f72

Credits

Mikaël Barbero Eclipse Foundation