CVE-2026-115892
Wasmtime: Panic lowering a host-created component model stream into a guest that expects a different payload type
02 Description
Wasmtime: Panic lowering a host-created component model stream into a guest that expects a different payload type
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
- 0.43% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 37.3% of scored records. A rank, not a probability.
- NVD base score
- 5.7 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:N/VI:N/VA:H/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 2026-10-29.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
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
- 2026-10-23 21:26Z6 DAYS AGO
- Last updated
- 2026-10-29 14:44Z10 HR AGO
- Reserved
- 2026-10-23
- Assigning CNA
- GitHub_M
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.7)
- CNA CVSS vector
- CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- Weaknesses
- Data version
- 5.2
- Document digest
- 549b4a2484750187870463129add7db2d5cce5e65b3311ef088a7bd82bf87cb4
05 Affected products
06 References
- github.comhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-9pvw-hwfg-92h5
- github.comhttps://github.com/bytecodealliance/wasmtime/pull/14819
- github.comhttps://github.com/bytecodealliance/wasmtime/pull/14820
- github.comhttps://github.com/bytecodealliance/wasmtime/pull/14827
- github.comhttps://github.com/bytecodealliance/wasmtime/commit/222ff3a65dab9aa7011f8c246937751a0bac5abd
- github.comhttps://github.com/bytecodealliance/wasmtime/commit/48dacc76241f06088e79f3ce1b17642f2f7bf158
- github.comhttps://github.com/bytecodealliance/wasmtime/commit/994549891c8a706cb4f2809f9d17b9f67b31e618
- github.comhttps://github.com/bytecodealliance/wasmtime/releases/tag/v48.0.7
- github.comhttps://github.com/bytecodealliance/wasmtime/releases/tag/v49.0.4
07 Fixed in
Ubuntu 24.04 LTS
- rust-wasmtime No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- rust-wasmtime No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- rust-wasmtime No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.