7.5

CVE-2025-26803: phusion passenger Use of Uninitialized Resource

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2025-26803DEBIAN-CVE-2025-26803GHSA-2cj2-qqxj-5m3r
Published 24-02-2025Last modified 24-02-2025
Open JSON

Vulnerability summary

CVE-2025-26803 is a high (CVSS 7.5) Use of Uninitialized Resource vulnerability in phusion passenger. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 48.5% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.62%
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. 24-02-2025
    PublishedVulnerability first disclosed.
  2. 24-02-2025
    Last modifiedVulnerability information updated.

Description

The http parser in Phusion Passenger 6.0.21 through 6.0.25 before 6.0.26 allows a denial of service during parsing of a request with an invalid HTTP method.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.62%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

0.00 pp

From 0.62% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.62%

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

Debian1 product
  • passenger< 6.0.26+ds-1
Phusion1 product
RubyGems1 product
  • passenger≥ 6.0.21, < 6.0.26
Ubuntu1 product
  • passengerAll versions (No fix recorded)

4 vendors · 4 products

References

12 links
Show all 12 references