01 Record
CVE-2026-112265
LangBot through 4.11.0 Missing Lark/Feishu Webhook Authenticity Verification
HighPUBLISHEDCNA: VulnCheck
CNA base score8.3 CVSS v4.0CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
02 Description
LangBot through 4.11.0 Missing Lark/Feishu Webhook Authenticity Verification
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.15% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 4.1% of scored records. A rank, not a probability.
- NVD base score
- 8.3 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/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 2026-10-19.
- 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.
04 Metadata
- Published
- 2026-10-19 13:55Z10 DAYS AGO
- Last updated
- 2026-10-19 16:35Z10 DAYS AGO
- Reserved
- 2026-10-19
- Assigning CNA
- VulnCheck
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.3)
- CNA CVSS vector
- CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
- Weaknesses
- CWE-345Insufficient Verification of Data AuthenticityClass
- Data version
- 5.2
- Document digest
- d44fa8ea3f9e73226b3de71bca5f9bbbb30436b4592a4e78a14111573330c2c1
05 Affected products
VendorProductVersionsPlatforms
06 References
- github.comhttps://github.com/langbot-app/LangBot/issues/2627
- github.comhttps://github.com/langbot-app/LangBot/commit/43c481d74a6388657b84baa7d292c613c75c24f9
- github.comhttps://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/adapters/lark/adapter.py
- github.comhttps://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/sources/lark.py
- github.comhttps://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/api/http/controller/groups/webhooks.py
- www.vulncheck.comVulnCheck Advisory: LangBot through 4.11.0 Missing Lark/Feishu Webhook Authenticity Verificationhttps://www.vulncheck.com/advisories/langbot-through-4.11.0-missing-lark-feishu-webhook-authenticity-verification