CVE-2016-8624: haxx curl Improper Input Validation
Vulnerability summary
CVE-2016-8624 is a high (CVSS 7.5) Improper Input Validation vulnerability in haxx curl. EPSS estimates a 6.25% chance of exploitation in the next 30 days, higher than 93.4% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 9 · Related 5Timeline
- 31-07-2018PublishedVulnerability first disclosed.
- 16-04-2026Last modifiedVulnerability information updated.
Description
curl before version 7.51.0 doesn't parse the authority component of the URL correctly when the host name part ends with a '#' character, and could instead be tricked into connecting to a different host. This may have security implications if you for example use an URL parser that follows the RFC to check for allowed domains before using curl to request them.
CVSS metrics
6 scores · 5 sources · 2 versions- CVE.orgCNA5.3MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NDiffers
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NDiffers
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS trend
Probability
6.25%
Chance of exploitation in the next 30 days
Percentile
93%
Versus all other CVEs
30-day change
0.00 pp
From 6.25% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Alpine1 product
- curl< 7.51.0-r0 | < 7.51.0 | < 7.49.1-r4
Debian1 product
- curl< 7.51.0-1
Haxx1 product
- curl< 7.51.0
The curl project1 product
- curl7.51.0
Ubuntu1 product
- curl< 7.35.0-1ubuntu2.10 | < 7.47.0-1ubuntu2.2
5 vendors · 5 products
References
17 links- bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8624X Refsource CONFIRMIssue TrackingPatchThird Party Advisory
- www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.htmlX Refsource CONFIRM