CVE-2026-19974

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.37% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 29.8% of scored records. A rank, not a probability.

NVD base score

2.9 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-08-20.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-08-17 02:15Z18 DAYS AGO

Last updated

2026-08-18 13:37Z17 DAYS AGO

Reserved

2026-08-16

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

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

Weaknesses

• CWE-287Improper AuthenticationClass

Data version

5.2

Document digest

edba60e4dcca18f9cd5dd69ab429942fb177e2859227b7b63e86c742137ec52c

• vuldb.comVDB-391153 | treefrogframework treefrog-framework Session Cookie tsessioncookiestore.cpp strncmp improper authenticationhttps://vuldb.com/vuln/391153vdb-entrytechnical-description
• vuldb.comVDB-391153 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/vuln/391153/ctisignaturepermissions-required
• vuldb.comCVE-2026-19974 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-19974third-party-advisory
• vuldb.comSubmit #873625 | treefrogframework TreeFrog Framework 2.9.0 through 2.11.2 (inclusive) Improper Verification of Cryptographic Signaturehttps://vuldb.com/submit/873625third-party-advisory
• github.comhttps://github.com/theopaid/Authentication-Bypass-via-HMAC-Session-Cookie-Forgery-treefrog-framework-exploit
• github.comhttps://github.com/treefrogframework/treefrog-framework/issues/436issue-tracking
• github.comhttps://github.com/treefrogframework/treefrog-framework/product