CVE-2025-6273
WebAssembly wabt binary-reader-objdump.cc LogOpcode assertion
- Published
- Updated
- Reserved
- Assigned by
- VulDB
Description
A vulnerability was found in WebAssembly wabt up to 1.0.37 and classified as problematic. This issue affects the function LogOpcode of the file src/binary-reader-objdump.cc. The manipulation leads to reachable assertion. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The code maintainer explains that this issue might not affect "real world wasm programs".
Public exploit
2 references of the record are tagged as an exploit or proof of concept: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: a proof of concept is public.
Timeline
ID reserved
By VulDB
Published
- 4 days later
· 4 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| VulDBCNA (assigner) | 4.0 | Medium4.8 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P |
| VulDBCNA (assigner) | 3.1 | Low3.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R |
| VulDBCNA (assigner) | 3.0 | Low3.3 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R |
| VulDBCNA (assigner) | 2.0 | Low1.7 | AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR |
| NVDNVD · Analyzed | 4.0 | Low1.9 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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 |
- EPSS (exploitation in 30 days)
- 0.24% · top 85% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.8.
Weakness
Affected products
- affected 1.0.0
- affected 1.0.1
- affected 1.0.2
- affected 1.0.3
- affected 1.0.4
- affected 1.0.5
- affected 1.0.6
- affected 1.0.7
- affected 1.0.8
- affected 1.0.9
- affected 1.0.10
- affected 1.0.11
- affected 1.0.12
- affected 1.0.13
- affected 1.0.14
- affected 1.0.15
- affected 1.0.16
- affected 1.0.17
- affected 1.0.18
- affected 1.0.19
- affected 1.0.20
- affected 1.0.21
- affected 1.0.22
- affected 1.0.23
- affected 1.0.24
- affected 1.0.25
- affected 1.0.26
- affected 1.0.27
- affected 1.0.28
- affected 1.0.29
- affected 1.0.30
- affected 1.0.31
- affected 1.0.32
- affected 1.0.33
- affected 1.0.34
- affected 1.0.35
- affected 1.0.36
- affected 1.0.37
References (5)
- VDB-313277 | WebAssembly wabt binary-reader-objdump.cc LogOpcode assertion (opens in a new tab)vdb-entrytechnical-description
- VDB-313277 | CTI Indicators (IOB, IOC, IOA) (opens in a new tab)signaturepermissions-required
- Submit #593010 | WebAssembly wabt wabt 1.0.37 (commit a60eb26) Reachable Assertion (opens in a new tab)third-party-advisory
- https://github.com/WebAssembly/wabt/issues/2574 (opens in a new tab)issue-trackingexploit
- https://github.com/user-attachments/files/19529411/wabt_crash.txt (opens in a new tab)exploit
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2025-6273)Record last updated .