7.5

CVE-2016-8624: haxx curl Improper Input Validation

CVSS: 7.5v3.0HighModified
AliasesALPINE-CVE-2016-8624UBUNTU-CVE-2016-8624DEBIAN-CVE-2016-8624
Published 31-07-2018Last modified 16-04-2026

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.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.0 (NVD)
EPSS score
6.25%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 9 · Related 5

Timeline

  1. 31-07-2018
    PublishedVulnerability first disclosed.
  2. 16-04-2026
    Last 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

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

18-09-202618-10-2026
EPSS score
6.25%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Alpine1 product
  • curl< 7.51.0-r0 | < 7.51.0 | < 7.49.1-r4
Debian1 product
  • curl< 7.51.0-1
Haxx1 product
The curl project1 product
Ubuntu1 product
  • curl< 7.35.0-1ubuntu2.10 | < 7.47.0-1ubuntu2.2

5 vendors · 5 products

References

17 links
Show all 17 references