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CVE-2024-34403VulnerabilityPublished Updated

CVE-2024-34403: uriparser · n/a

Affects uriparserSource CVE Database V5

0

Not known to be exploited · CVSS 5.9 Medium : upgrade to 0.9.8 when convenient.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score
5.9Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
1.3% chance of exploitation in 30 days – higher than 70% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.9.8
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 May 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

What to do

Upgrade uriparser/uriparser to 0.9.8.

Affected software

ProductAffectedFixed in
GitHuburiparser/uriparserpkg:github/uriparser/uriparserOther threatsAffected
  • <0.9.8
Fixed in
  • 0.9.8

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Since no official patches are currently available, European organizations should take immediate steps to mitigate risk. First, conduct an inventory to identify all software and devices using uriparser, including embedded systems and network appliances. Implement input validation and length checks on URI query strings to prevent excessively long inputs that could trigger the overflow. Employ runtime protections such as memory corruption detection tools (e.g., AddressSanitizer) during development and testing phases. Where possible, isolate vulnerable components behind firewalls or proxies to limit exposure to untrusted network inputs. Monitor logs and network traffic for anomalous URI query patterns indicative of exploitation attempts. Engage with software vendors and open-source maintainers to track patch releases and apply updates promptly once available. Additionally, consider deploying application-layer firewalls or intrusion prevention systems configured to detect and block suspicious URI queries. For critical systems, plan for potential failover or redundancy to maintain availability in case of denial of service.

Description

An issue was discovered in uriparser through 0.9.7. ComposeQueryMallocExMm in UriQuery.c has an integer overflow via a long string.

References

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