github.com/nyaruka/phonenumbers: Improper Validation of Syntactic Correctness of Input
CVE-2025-10954 is a high-severity improper validation of syntactic correctness of input vulnerability in github.com/nyaruka/phonenumbers, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 1.2.2 as the first without the flaw, so updating github.com/nyaruka/phonenumbers to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.46% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update github.com/nyaruka/phonenumbers to 1.2.2 or a later version.
- Update Phonenumbers to 1.2.2 or a later version.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Github.com/nyaruka/phonenumbers | github.com/nyaruka/phonenumbers | before 1.2.2 | 1.2.2 |
| Textit | Phonenumbers | before 1.2.2 | 1.2.2 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 5.5 | Medium | CNA (snyk.io) |
| CVSS 3.1 | 5.3 | Medium | CNA (snyk.io) |
| CVSS 3.1 | 7.5 | High | NVD |
Official description
Versions of the package github.com/nyaruka/phonenumbers before 1.2.2 are vulnerable to Improper Validation of Syntactic Correctness of Input in the phonenumbers.Parse() function. An attacker can cause a panic by providing crafted input causing a "runtime error: slice bounds out of range".
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Validation of Syntactic Correctness of Input
The product receives input that is expected to be well-formed - i.e., to comply with a certain syntax - but it does not validate or incorrectly validates that the input complies with the syntax.
More Improper Validation of Syntactic Correctness of Input vulnerabilities (CWE-1286)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
Technical write-ups (may include proof of concept)
- security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMNYARUKAPHONENUMBERS-6084070Exploit, Third Party Advisory
Recent Improper Validation of Syntactic Correctness of Input vulnerabilities
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- 7.5 High severity
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- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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