CVE-2026-44927

Integrity loss via pointer-difference truncation

Published May 8, 2026 · Updated May 8, 2026

Numeric truncation in uriparser before 1.0.2 allows local users to corrupt URI-processing results through oversized URI data. CopyRange, RemoveDotSegmentsEx, AppendQueryItem, normalization, file-name conversion, query composition, and URI recomposition paths cast pointer differences from ptrdiff_t to int before using them as lengths. Reachability requires a consuming application to process a URI or related text range larger than INT_MAX; the published impact is limited to low-integrity modification, with no reported disclosure or service interruption.

CVSS severity2.9
Low
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Numeric truncation in uriparser before 1.0.2 allows local users to corrupt URI-processing results through oversized URI data. CopyRange, RemoveDotSegmentsEx, AppendQueryItem, normalization, file-name conversion, query composition, and URI recomposition paths cast pointer differences from ptrdiff_t to int before using them as lengths. Reachability requires a consuming application to process a URI or related text range larger than INT_MAX; the published impact is limited to low-integrity modification, with no reported disclosure or service interruption.

The record

CVE
CVE-2026-44927
Published
May 8, 2026
Updated
May 8, 2026
Vendor
uriparser project
Product
uriparser
Classifications
CWE-197
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.0.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

uriparser project · uriparserversion=0 <1.0.2

Published CVSS scores

2.9MITRECVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-197Numeric Truncation Error

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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