Skip to content
CVE Tracker
Back

CVE-2016-8622

The URL percent-encoding decode function in libcurl before 7.51.0 is called `curl_easy_unescape`. Internally, even if this function would…

Low3.7EPSS 4.7%
Published
Updated
Reserved
Assigned by
redhat

Description

The URL percent-encoding decode function in libcurl before 7.51.0 is called `curl_easy_unescape`. Internally, even if this function would be made to allocate a unscape destination buffer larger than 2GB, it would return that new length in a signed 32 bit integer variable, thus the length would get either just truncated or both truncated and turned negative. That could then lead to libcurl writing outside of its heap based buffer.

Scores

CVSS scores of CVE-2016-8622, by who scored it
Scored byCVSSScoreVector
redhatCNA (assigner)3.0Low3.7CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
NVDNVD · Modified3.0Critical9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
4.7% · top 8.2% of all CVEs (2 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial

Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.7.

Weakness

Affected products

  • The Curl Project · curl

    • affected 7.51.0

References (9)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .