9.4

CVE-2026-33454: apache software foundation apache camel Deserialization of Untrusted Data

CVSS: 9.4v3.1CriticalModified
AliasesGHSA-2vqf-x7g4-7c2g
Published 27-04-2026Last modified 15-07-2026
Open JSON

Vulnerability summary

CVE-2026-33454 is a critical (CVSS 9.4) Deserialization of Untrusted Data vulnerability in apache software foundation apache camel. EPSS estimates a 1.03% chance of exploitation in the next 30 days, higher than 63.3% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.4/10
010
Critical · v3.1 (CVE.org)
EPSS score
1.03%
0%100%
Low · +0.41 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 27-04-2026
    PublishedVulnerability first disclosed.
  2. 15-07-2026
    Last modifiedVulnerability information updated.

Description

The Camel-Mail component is vulnerable to Camel message header injection. The custom header filter strategy used by the component (MailHeaderFilterStrategy) only filters the 'out' direction via setOutFilterStartsWith, while it does not configure the 'in' direction via setInFilterStartsWith. As a result, when a Camel application consumes mail through camel-mail (for example via from(\"imap://...\") or from(\"pop3://...\")) the inbound filter check is skipped and Camel-prefixed MIME headers are mapped unfiltered into the Exchange. An attacker who can deliver an email to a mailbox monitored by such a consumer can inject Camel-specific headers that, for some Camel components downstream of the mail consumer (such as camel-bean, camel-exec, or camel-sql), can alter the behaviour of the route. This is the same pattern that was previously addressed in camel-undertow (CVE-2025-30177) and the broader incoming-header filter (CVE-2025-27636 and CVE-2025-29891). This issue affects Apache Camel: from 3.0.0 before 4.14.6, from 4.15.0 before 4.18.1. Users are recommended to upgrade to version 4.19.0, which fixes the issue. If users are on the 4.18.x LTS releases stream, then they are suggested to upgrade to 4.18.1. If users are on the 4.14.x LTS releases stream, then they are suggested to upgrade to 4.14.6.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

1.03%

Chance of exploitation in the next 30 days

Percentile

63%

Versus all other CVEs

30-day change

+0.41 pp

From 0.62% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.03%

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

Apache1 product
  • camel≥ 3.0.0, < 4.14.6 | ≥ 4.15.0, < 4.18.1
Apache software foundation1 product
Org.apache.camel1 product
  • camel-mail≥ 3.0.0, < 4.14.6 | ≥ 4.15.0, < 4.18.1

3 vendors · 3 products

References

22 links
Show all 22 references