CVE-2026-24734: Apache Tomcat Native, Apache Tomcat: OCSP revocation bypass
Noroxi assessment
Priority: Monitor (action score 30/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.57% (FIRST EPSS).
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: tomcat (AlmaLinux:10) 1:10.1.49-1.el10_2.1.alma.1; tomcat-admin-webapps (AlmaLinux:10) 1:10.1.49-1.el10_2.1.alma.1; tomcat-docs-webapp (AlmaLinux:10) 1:10.1.49-1.el10_2.1.alma.1.
Low priority for now. Upgrade to tomcat (AlmaLinux:10) 1:10.1.49-1.el10_2.1.alma.1; tomcat-admin-webapps (AlmaLinux:10) 1:10.1.49-1.el10_2.1.alma.1; tomcat-docs-webapp (AlmaLinux:10) 1:10.1.49-1.el10_2.1.alma.1 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat. When using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed. This issue affects Apache Tomcat Native: from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114. The following versions were EOL at the time the CVE was created but are known to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39. Older EOL versions are not affected. Apache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue. Apache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.
- BDU:2026-05104
- GHSA-mgp5-rv84-w37q
- ALSA-2026:19054
- ALSA-2026:26323
- DSA-6120-1
- openSUSE-SU-2026:10305-1
- openSUSE-SU-2026:10306-1
- openSUSE-SU-2026:10307-1
- openSUSE-SU-2026:20350-1
- openSUSE-SU-2026:20414-1
- openSUSE-SU-2026:20444-1
- RHSA-2026:19054
- RHSA-2026:26323
- RHSA-2026:5611
- RHSA-2026:6569
- RHSA-2026:8334
- RLSA-2026:19054
- RLSA-2026:25341
- RLSA-2026:26323
- SUSE-SU-2026:0877-1
- Published
- Feb 17, 2026
- Updated
- Jul 15, 2026
- EPSS
- 0.5% · 47th percentile
- CWE
- CWE-20
Report tools
Action score
30
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| apache | tomcat | cpe:2.3:a:apache:tomcat |
| apache | tomcat native | cpe:2.3:a:apache:tomcat_native |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apache tomcat9.0.83 and later · before 9.0.115
- apache tomcat10.1.1 and later · before 10.1.52
- apache tomcat11.0.1 and later · before 11.0.18
- apache tomcat10.1.0
- apache tomcat11.0.0
- apache tomcat native1.3.0 and later · before 1.3.5
- apache tomcat native2.0.0 and later · before 2.0.12
Versions reported by the vendor
Affected version ranges reported by the assigning authority (apache). Independent of NVD's CPE analysis and usually ahead of it.
Apache Software Foundation Apache Tomcat
- 11.0.0-M1 and later · up to and including 11.0.17affected · semver
- 10.1.0-M7 and later · up to and including 10.1.51affected · semver
- 9.0.83 and later · up to and including 9.0.114affected · semver
- up to and including 8.5.100not affected · semver
Apache Software Foundation Apache Tomcat Native
- 1.1.23 and later · up to and including 1.1.34affected · semver
- 1.2.0 and later · up to and including 1.2.39affected · semver
- 1.3.0 and later · up to and including 1.3.4affected · semver
- 2.0.0 and later · up to and including 2.0.11affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:10 | tomcat | before 1:10.1.49-1.el10_2.1.alma.1 | 1:10.1.49-1.el10_2.1.alma.1 |
| AlmaLinux:10 | tomcat-admin-webapps | before 1:10.1.49-1.el10_2.1.alma.1 | 1:10.1.49-1.el10_2.1.alma.1 |
| AlmaLinux:10 | tomcat-docs-webapp | before 1:10.1.49-1.el10_2.1.alma.1 | 1:10.1.49-1.el10_2.1.alma.1 |
| AlmaLinux:10 | tomcat-el-5.0-api | before 1:10.1.49-1.el10_2.1.alma.1 | 1:10.1.49-1.el10_2.1.alma.1 |
| AlmaLinux:10 | tomcat-jsp-3.1-api | before 1:10.1.49-1.el10_2.1.alma.1 | 1:10.1.49-1.el10_2.1.alma.1 |
| AlmaLinux:10 | tomcat-lib | before 1:10.1.49-1.el10_2.1.alma.1 | 1:10.1.49-1.el10_2.1.alma.1 |
| AlmaLinux:10 | tomcat-servlet-6.0-api | before 1:10.1.49-1.el10_2.1.alma.1 | 1:10.1.49-1.el10_2.1.alma.1 |
| AlmaLinux:10 | tomcat-webapps | before 1:10.1.49-1.el10_2.1.alma.1 | 1:10.1.49-1.el10_2.1.alma.1 |
| AlmaLinux:9 | tomcat | before 1:9.0.117-1.el9_8 | 1:9.0.117-1.el9_8 |
| AlmaLinux:9 | tomcat-admin-webapps | before 1:9.0.117-1.el9_8 | 1:9.0.117-1.el9_8 |
| AlmaLinux:9 | tomcat-docs-webapp | before 1:9.0.117-1.el9_8 | 1:9.0.117-1.el9_8 |
| AlmaLinux:9 | tomcat-el-3.0-api | before 1:9.0.117-1.el9_8 | 1:9.0.117-1.el9_8 |
| AlmaLinux:9 | tomcat-jsp-2.3-api | before 1:9.0.117-1.el9_8 | 1:9.0.117-1.el9_8 |
| AlmaLinux:9 | tomcat-lib | before 1:9.0.117-1.el9_8 | 1:9.0.117-1.el9_8 |
| AlmaLinux:9 | tomcat-servlet-4.0-api | before 1:9.0.117-1.el9_8 | 1:9.0.117-1.el9_8 |
| AlmaLinux:9 | tomcat-webapps | before 1:9.0.117-1.el9_8 | 1:9.0.117-1.el9_8 |
| Debian:12 | tomcat10 | before 10.1.52-1~deb12u1 | 10.1.52-1~deb12u1 |
| Debian:12 | tomcat9 | before 9.0.70-2 | 9.0.70-2 |
| Debian:13 | tomcat10 | before 10.1.52-1~deb13u1 | 10.1.52-1~deb13u1 |
| Debian:13 | tomcat11 | before 11.0.22-1~deb13u1 | 11.0.22-1~deb13u1 |
| Debian:14 | tomcat10 | before 10.1.52-1 | 10.1.52-1 |
| Debian:14 | tomcat11 | before 11.0.18-1 | 11.0.18-1 |
| Maven | org.apache.tomcat:tomcat-coyote | from 10.1.0-M7 · before 10.1.52 | 10.1.52 |
| Maven | org.apache.tomcat:tomcat-coyote | from 11.0.0-M1 · before 11.0.18 | 11.0.18 |
+91
Same product
apache: all recordsOther highest-scoring records for the same primary product.
- CVE-2025-24813Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUTKEV99Now
- CVE-2016-8735Remote code execution is possible with Apache Tomcat before 6.0.48, 7.x before 7.0.73, 8.x before 8.0.39, 8.5.x before 8.5.7, and 9.x beforeKEV96Now
- CVE-2017-12617When running Apache Tomcat versions 9.0.0.M1 to 9.0.0, 8.5.0 to 8.5.22, 8.0.0.RC1 to 8.0.46 and 7.0.0 to 7.0.81 with HTTP PUTs enabled (e.g.KEV92Now
Published before and after this one in the same product
- ← EarlierCVE-2025-66614Feb 17, 2026 · Apache Tomcat: Client certificate verification bypass due to virtual host mapping36Monitor
- ← EarlierCVE-2026-24733Feb 17, 2026 · Apache Tomcat: Security constraint bypass with HTTP/0.914Monitor
- Later →CVE-2026-24880Apr 9, 2026 · Apache Tomcat: Request smuggling via invalid chunk extension30Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:tomcat | 1:10.1.49-1.el10_2.1.alma.1 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:tomcat-admin-webapps | 1:10.1.49-1.el10_2.1.alma.1 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:tomcat-docs-webapp | 1:10.1.49-1.el10_2.1.alma.1 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:tomcat-el-3.0-api | 1:9.0.117-1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:tomcat-el-5.0-api | 1:10.1.49-1.el10_2.1.alma.1 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:tomcat-jsp-2.3-api | 1:9.0.117-1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:tomcat-jsp-3.1-api | 1:10.1.49-1.el10_2.1.alma.1 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:tomcat-lib | 1:10.1.49-1.el10_2.1.alma.1 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:tomcat-servlet-4.0-api | 1:9.0.117-1.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:tomcat-servlet-6.0-api | 1:10.1.49-1.el10_2.1.alma.1 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:tomcat-webapps | 1:10.1.49-1.el10_2.1.alma.1 · AlmaLinux:10 | Package registry (OSV) |
| debian:tomcat10 | 10.1.52-1~deb12u1 · Debian:12 | Package registry (OSV) |
| debian:tomcat11 | 11.0.22-1~deb13u1 · Debian:13 | Package registry (OSV) |
| debian:tomcat9 | 9.0.70-2 · Debian:12 | Package registry (OSV) |
| Maven:org.apache.tomcat:tomcat-coyote | 10.1.52 | Package registry (OSV) |
| Maven:org.apache.tomcat:tomcat-coyote | 11.0.18 | Package registry (OSV) |
| Maven:org.apache.tomcat:tomcat-coyote | 9.0.115 | Package registry (OSV) |
| Maven:org.apache.tomcat.embed:tomcat-embed-core | 10.1.52 | Package registry (OSV) |
| Maven:org.apache.tomcat.embed:tomcat-embed-core | 11.0.18 | Package registry (OSV) |
| Maven:org.apache.tomcat.embed:tomcat-embed-core | 9.0.115 | Package registry (OSV) |
| opensuse:tomcat | 9.0.115-150200.102.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:tomcat10 | 10.1.52-150200.5.61.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:tomcat11 | 11.0.18-150600.13.15.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| red hat:jws6-tomcat | 0:10.1.49-9.redhat_00007.1.el10jws · Red Hat:jboss_enterprise_web_server:6.2::el10 | Package registry (OSV) |
| red hat:tomcat | 1:10.1.49-1.el10_2.1 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:tomcat-admin-webapps | 1:10.1.49-1.el10_2.1 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:tomcat-docs-webapp | 1:10.1.49-1.el10_2.1 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:tomcat-el-3.0-api | 1:9.0.117-1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:tomcat-el-5.0-api | 1:10.1.49-1.el10_2.1 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:tomcat-jsp-2.3-api | 1:9.0.117-1.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
+10
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2026-4129384 days apartApache Tomcat: HTTP/2 request headers not validated40Plan
- CVE-2026-65637189 days apartApache Tomcat: HTTP/2 no-authority bypass of strict SNI validation - CVE-2026-32990 fix incomplete39Monitor
- CVE-2025-666140 days apartApache Tomcat: Client certificate verification bypass due to virtual host mapping36Monitor
- CVE-2026-3299051 days apartApache Tomcat: Fix for CVE-2025-66614 is incomplete21Monitor
- CVE-2026-247330 days apartApache Tomcat: Security constraint bypass with HTTP/0.914Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- high · data or configuration can be modified
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- High
- Availability impact
- None
Weakness class (CWE)
CWE-20 · Improper Input ValidationCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Server Side Include (SSI) InjectionCAPEC-101likelihood: High · High
- Cross Zone ScriptingCAPEC-104likelihood: Medium · High
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Object Relational Mapping InjectionCAPEC-109likelihood: Low · High
- SQL Injection through SOAP Parameter TamperingCAPEC-110likelihood: High · Very High
- Double EncodingCAPEC-120likelihood: Low · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
ATT&CK techniques
- Obfuscated Files or InformationT1027
- Masquerading: Invalid Code SignatureT1036.001
- Steal Web Session CookieT1539
- Subvert Trust Controls: Code SigningT1553.002
- Impair Defenses:Impair Command History LoggingT1562.003
- Hijack Execution Flow:Dynamic Linker HijackingT1574.006
- Hijack Execution Flow:Path Interception by PATH Environment VariableT1574.007
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (10 more)Show less
- access.redhat.com/errata/RHSA-2026:19054
- access.redhat.com/errata/RHSA-2026:26323
- access.redhat.com/errata/RHSA-2026:36790
- access.redhat.com/errata/RHSA-2026:5611
- access.redhat.com/errata/RHSA-2026:5612
- access.redhat.com/errata/RHSA-2026:6569
- access.redhat.com/errata/RHSA-2026:8334
- access.redhat.com/security/cve/CVE-2026-24734
- bugzilla.redhat.com/show_bug.cgi?id=2440426
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24734.json
Vendor advisories and official records. Exploit/PoC links are deliberately left out.