HIGH

CVE-2026-97055

CVSS v3

8.1

HIGH

EPSS Score

0.4 %

exploit probability, as of 2026-09-28

CISA KEV

known exploited

Exploitation

—

SSVC status

Description

SigNoz from v0.8.0 before v0.143.0 defaults the JWT tokenizer signing secret (tokenizer::jwt::secret, set via SIGNOZ_TOKENIZER_JWT_SECRET or the deprecated SIGNOZ_JWT_SECRET) to an empty string, and Config.Validate() does not reject the empty value, so a deployment that does not configure a secret starts up and both signs and verifies session tokens with an empty HMAC key. Because the JWT tokenizer was the default provider, any such deployment is affected. An unauthenticated attacker who knows t

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2026-09-24
Last Modified: 2026-09-24

Frequently asked questions

What is CVE-2026-97055?

Is CVE-2026-97055 actively exploited?

Active exploitation of CVE-2026-97055 has not been confirmed. Its EPSS score was 0.4% on 2026-09-28, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-97055?

CVE-2026-97055 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

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