vulnerability / NVI-00013828 / Revision 1
smol-toml: Denial of Service via malformed TOML documents
GitHub lists this reviewed advisory for smol-toml. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
smol-toml
source listed<= 1.7.0
### Summary `parse()` can be forced into an infinite loop when a value inside an array or inline table is followed by a comment that has no trailing newline (i.e. the comment "ends" the document). The library fails to exit an internal loop when attempting to find the end of the structure, resetting its cursor to the beginning of the string instead. This causes the parser to indefinitely hang, compromising the availability of the service. ### Proof of concept ```js import { parse } from 'smol-toml' parse('a=[1 #') // never returns; CPU pinned at 100% ``` ### Impact Applications which parse arbitrary TOML documents can suffer major availability issues if they receive malicious input. This issue is particularly severe for these use-cases, and it is **strongly advised** to upgrade to an up-to-date version of the library as soon as possible. If your use-case does not involve parsing arbitrary TOML documents from untrusted sources, the impact is much lower in practice, although it's still advisable to update to version 1.7.1. ### Patches Version 1.7.1 properly breaks out of the loop in these situations and throws the expected `TomlError`. ### Workarounds None that don't invol
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
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04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
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- GHSA-7w5x-hrqm-74c2 ↗
GitHub Advisory Database · vendor advisory
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Public revision history
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- Revision 1 ·
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