CVE-2026-42499
Quadratic string concatenation in consumePhrase in net/mail
HIGH
7.5
CVSS Score
Published: May 7, 2026 at 07:41 PM UTC
Updated: October 26, 2026 at 12:10 AM UTC
33 products affected across 3 vendorsGoNet/mailEnterprise Linux
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Severity
HIGH7.5
Exploit prediction
EPSS 0.8%
SSVC
No known exploit
Description
Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
All versionsv < 1.25.101.26.0 ≤ v < 1.26.3
Affected range stops below 1.25.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.26.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.25.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.26.3, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 2 (unaffected)
All versions
60%
Vendor states this is fixed in 0:1.1.4-1.el10em (unaffected)
Vendor states this is fixed in 0:1.1.4-1.el9em (unaffected)
Vendor states this is fixed in 0:0.152.1-2.el10_0 (unaffected)
Vendor states this is fixed in 0:0.152.1-2.el10_2 (unaffected)
Vendor states this is fixed in 0:0.152.1-2.el9_4 (unaffected)
Vendor states this is fixed in 0:0.152.1-2.el9_6 (unaffected)
Vendor states this is fixed in 0:0.152.1-2.el9_8 (unaffected)
Vendor states this is fixed in 0:1.26.3-1.el9_8 (unaffected)
Vendor states this is fixed in 0:1.26.3-4.el10_2 (unaffected)
Vendor states this is fixed in 0:1.26.5-1.el10_0 (unaffected)
Vendor states this is fixed in 0:1.26.5-1.el9_2 (unaffected)
Vendor states this is fixed in 0:1.26.5-1.el9_4 (unaffected)
Vendor states this is fixed in 0:1.26.5-1.el9_6 (unaffected)
Vendor states this is fixed in 0:10.2.6-22.el9_6 (unaffected)
Vendor states this is fixed in 0:10.2.6-23.el9_8.3 (unaffected)
Vendor states this is fixed in 0:10.2.6-26.el10_0 (unaffected)
Vendor states this is fixed in 0:10.2.6-28.el10_2.5 (unaffected)
Vendor states this is fixed in 0:101.3-4.el9_4.6 (unaffected)
Vendor states this is fixed in 0:101.5-3.el8_10 (unaffected)
Vendor states this is fixed in 0:132.2-12.el9_6 (unaffected)
Vendor states this is fixed in 0:134.1-12.el10_0 (unaffected)
Vendor states this is fixed in 0:165.1-3.el10_2.2 (unaffected)
Vendor states this is fixed in 0:165.1-4.el9_8.1 (unaffected)
Vendor states this is fixed in 0:2.21.0-3.el10_0.4 (unaffected)
Vendor states this is fixed in 0:2.21.0-7.el9_6.1 (unaffected)
Vendor states this is fixed in 0:52.1-1.el10_2.2 (unaffected)
Vendor states this is fixed in 0:52.1-1.el9_8.2 (unaffected)
Vendor states this is fixed in 0:75-10.el8_8 (unaffected)
Vendor states this is fixed in 0:76.1-9.el9_2 (unaffected)
Vendor states this is fixed in 0:9.2.10-33.el8_10 (unaffected)
Vendor states this is fixed in 2:1.22.2-5.el10_2 (unaffected)
Vendor states this is fixed in 2:1.43.1-5.el10_2 (unaffected)
Vendor states this is fixed in 8100020260518131104.a3795dee (unaffected)
Vendor states this is fixed in 8100020260901110702.afee755d (unaffected)
Vendor states this is fixed in 9 (unaffected)
All versions
All versions
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (101)
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:33120Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:33123Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:33142Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/errata/RHSA-2026:33150SSVC — Action Prioritization
SSVCNo known exploitAutomatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.5HIGHCISA-ADP
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-1046
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