5.3

CVE-2025-57783: hiawatha-webserver hiawatha

CVSS: 5.3v3.1MediumAnalyzed
Published 26-01-2026Last modified 26-01-2026
Open JSON

Vulnerability summary

CVE-2025-57783 is a medium (CVSS 5.3) vulnerability in hiawatha-webserver hiawatha. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 40% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.48%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 26-01-2026
    PublishedVulnerability first disclosed.
  2. 26-01-2026
    Last modifiedVulnerability information updated.

Description

Improper header parsing may lead to request smuggling has been identified in Hiawatha webserver version 11.7 which allows an unauthenticated attacker to access restricted resources managed by Hiawatha webserver.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.48%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

0.00 pp

From 0.48% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.48%

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

No weakness data has been published for this record.

Affected systems

Hiawatha1 product
Hiawatha-webserver1 product

2 vendors · 2 products

References

1 links