6.5

CVE-2026-59882: guzzle psr7 Interpretation Conflict

CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-59882DEBIAN-CVE-2026-59882
Published 08-07-2026Last modified 08-07-2026
Open JSON

Vulnerability summary

CVE-2026-59882 is a medium (CVSS 6.5) Interpretation Conflict vulnerability in guzzle psr7. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 23.2% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.32%
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. 08-07-2026
    PublishedVulnerability first disclosed.
  2. 08-07-2026
    Last modifiedVulnerability information updated.

Description

guzzlehttp/psr7 is a PSR-7 HTTP message library implementation in PHP. Prior to 2.12.3, Uri::assertValidHost() does not reject URI host components containing authority delimiters, embedded ports, or malformed IPv6 brackets, allowing Uri::getHost() to disagree with the URI authority used for security or routing decisions. This issue is fixed in version 2.12.3.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.32%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

0.00 pp

From 0.32% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.32%

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
  • php-guzzlehttp-psr7All versions (No fix recorded) | < 2.12.3-1
Guzzle1 product
Guzzlephp1 product
Ubuntu1 product
  • php-guzzlehttp-psr7All versions (No fix recorded)

4 vendors · 4 products

References

7 links