CVE-2026-35535
No exploitation reported by the sources we read.
- Published2026-04-03
- Fixed in1.9.17
- WeaknessCWE-271 · CWE-272
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
In Sudo through 1.9.17p2 before 3e474c2, a failure of a setuid, setgid, or setgroups call, during a privilege drop before running the mailer, is not a fatal error and can lead to privilege escalation.
Timeline
dates in UTC- 2026-04-0303:16CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-35535?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-35535?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.9 | < 1.9.17 | 1.9.17 | NVD |
| 1.9 | = 1.9.17 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.0 | < 4.0 | 4.0 | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- sudoAlmaLinux:10all versions · fixed in 1.9.17-4.p2.el10_2and 1 other package
- sudoAlmaLinux:10all versions · fixed in 1.9.15-10.p5.el10_1and 1 other package
- sudoAlmaLinux:9all versions · fixed in 1.9.17p2-3.el9_8and 1 other package
- sudoAlmaLinux:9all versions · fixed in 1.9.5p2-15.el9_7and 1 other package
- sudoAlmaLinux:8all versions · fixed in 1.9.5p2-1.el8_10.5
Vendor advisories
sudo: Sudo: Privilege escalation due to failure in privilege drop calls
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Red Hat Security Advisory: Red Hat Update Infrastructure 5.3 Technology Preview security update
Red Hat Security Advisory: OpenShift Container Platform 4.17.55 bug fix and security update
Red Hat Security Advisory: OpenShift Container Platform 4.14.68 bug fix and security update
Red Hat Security Advisory: Red Hat AI Inference Server 3.3.5 (ROCm)
23 more advisories
Fix
- Update Sudo project sudo to 1.9.17
- Vendor fix Red Hat Product Security RHSA-2026:65569 · 9 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
- Vendor fix Red Hat Product Security RHSA-2026:58981 · 2 productsPlease consult the RHUI Technology Preview Release Notes at https://access.redhat.com/articles/7141172 for instructions on how to use this image set.
- Vendor fix Red Hat Product Security RHSA-2026:34098 · 4 productsFor OpenShift Container Platform 4.17 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
- Vendor fix Red Hat Product Security RHSA-2026:28887 · 4 productsFor OpenShift Container Platform 4.14 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
- Vendor fix Red Hat Product Security RHSA-2026:30088 · 1 productFor more information visit https://access.redhat.com/errata/RHSA-2026:30088
- Vendor fix Red Hat Product Security RHSA-2026:23233 · 4 productsFor OpenShift Container Platform 4.15 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.…
Advisories and patches
- github.comPatch
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Published
- 2026-04-03
- Last Modified
- 2026-09-01
- NVD status
- Modified
Frequently asked questions
What is CVE-2026-35535?
Is CVE-2026-35535 actively exploited?
What is the CVSS score for CVE-2026-35535?
Running sudo? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.
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- CVE-2023-22809same product
- CVE-2025-32462same product
- CVE-2023-42465same product
- CVE-2026-96512same product
- CVE-2026-82474same productSudo through 1.9.17p2 Intercept Policy Bypass via execveat
- CVE-2026-48710KEVsame advisory
- CVE-2026-43284same advisoryxfrm: esp: avoid in-place decrypt on shared skb frags