CVE-2021-26291: block repositories using http by default
Noroxi assessment
Priority: Monitor (action score 39/100)
- Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
- Probability of exploitation in the next 30 days: 8.6% (FIRST EPSS); higher than 95.1% of all records.
- 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: maven (Debian:12) 3.8.6-1; org.apache.maven:maven-compat (Maven) 3.8.1; org.apache.maven:maven-core (Maven) 3.8.1.
- Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to maven (Debian:12) 3.8.6-1; org.apache.maven:maven-compat (Maven) 3.8.1; org.apache.maven:maven-core (Maven) 3.8.1 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
Apache Maven will follow repositories that are defined in a dependency’s Project Object Model (pom) which may be surprising to some users, resulting in potential risk if a malicious actor takes over that repository or is able to insert themselves into a position to pretend to be that repository. Maven is changing the default behavior in 3.8.1+ to no longer follow http (non-SSL) repository references by default. More details available in the referenced urls. If you are currently using a repository manager to govern the repositories used by your builds, you are unaffected by the risks present in the legacy behavior, and are unaffected by this vulnerability and change to default behavior. See this link for more information about repository management: https://maven.apache.org/repository-management.html
- Published
- Apr 23, 2021
- Updated
- Jun 16, 2026
- EPSS
- 8.6% · 95th percentile
- CWE
- CWE-346
Report tools
Action score
39
Low priority for now.
- CVSS
- 36 / 40 · 9.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 3 / 30 · 8.6%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- Proof of concept exists, no weaponized module
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi 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 | maven | cpe:2.3:a:apache:maven |
| quarkus | quarkus | cpe:2.3:a:quarkus:quarkus |
| oracle | financial services analytical applications infrastructure | cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure |
| oracle | goldengate big data and application adapters | cpe:2.3:a:oracle:goldengate_big_data_and_application_adapters |
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 Maven
- Apache Maven and later · up to and including 3.8.1affected
Affected versions · NVD (5)
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apache mavenbefore 3.8.1
- oracle financial services analytical applications infrastructure8.0.6.0.0 and later · up to 8.0.9.0.0 inclusive
- oracle financial services analytical applications infrastructure8.1.0.0.0 and later · up to 8.1.2.0 inclusive
- oracle goldengate big data and application adapters23.1
- quarkus quarkusbefore 1.13.5
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | maven | before 3.8.6-1 | 3.8.6-1 |
| Maven | org.apache.maven:maven-compat | before 3.8.1 | 3.8.1 |
| Maven | org.apache.maven:maven-core | before 3.8.1 | 3.8.1 |
| openSUSE:Tumbleweed | clojure | before 1.10.3.855-1.2 | 1.10.3.855-1.2 |
| Red Hat:ocp_tools:4.11::el8 | jenkins | before 0:2.387.1.1683009763-3.el8 | 0:2.387.1.1683009763-3.el8 |
| Red Hat:ocp_tools:4.11::el8 | jenkins-2-plugins | before 0:4.11.1683009941-1.el8 | 0:4.11.1683009941-1.el8 |
| Red Hat:ocp_tools:4.12::el8 | jenkins | before 0:2.426.3.1706515686-3.el8 | 0:2.426.3.1706515686-3.el8 |
| Red Hat:ocp_tools:4.12::el8 | jenkins-2-plugins | before 0:4.12.1706515741-1.el8 | 0:4.12.1706515741-1.el8 |
| Red Hat:ocp_tools:4.13::el8 | jenkins | before 0:2.426.3.1706516254-3.el8 | 0:2.426.3.1706516254-3.el8 |
| Red Hat:ocp_tools:4.13::el8 | jenkins-2-plugins | before 0:4.13.1706516346-1.el8 | 0:4.13.1706516346-1.el8 |
Same product
apache: all recordsOther highest-scoring records for the same primary product.
- CVE-2013-0253The default configuration of Apache Maven 3.0.4, when using Maven Wagon 2.1, disables SSL certificate checks, which allows remote attackers…23Monitor
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 |
|---|---|---|
| debian:maven | 3.8.6-1 · Debian:12 | Package registry (OSV) |
| Maven:org.apache.maven:maven-compat | 3.8.1 | Package registry (OSV) |
| Maven:org.apache.maven:maven-core | 3.8.1 | Package registry (OSV) |
| opensuse:clojure | 1.10.3.855-1.2 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:jenkins | 0:2.387.1.1683009763-3.el8 · Red Hat:ocp_tools:4.11::el8 | Package registry (OSV) |
| red hat:jenkins-2-plugins | 0:4.11.1683009941-1.el8 · Red Hat:ocp_tools:4.11::el8 | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:0 | 2025-02-19 |
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.
- Published
- First PoC+1398 d
- TodayNov 12, 2026+2029 d
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-23-0275 · May 18, 2023(Jenkins Güvenlik Güncellemesi)
- TR-22-0247 · Mar 24, 2022(RedHat Güvenlik Güncellemesi)
Not on record for this CVE: EPSS history · patch commit or PR link · variant or chain candidate · public bounty program.
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
- high · data can be read
- 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
- High
- Integrity impact
- High
- Availability impact
- None
Weakness class (CWE)
CWE-346 · Origin Validation ErrorCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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)
- JSON Hijacking (aka JavaScript Hijacking)CAPEC-111likelihood: High · High
- Cache PoisoningCAPEC-141likelihood: High · High
- DNS Cache PoisoningCAPEC-142likelihood: High · High
- Exploit Script-Based APIsCAPEC-160Medium
- Exploitation of Trusted IdentifiersCAPEC-21likelihood: High · High
- Application API Message Manipulation via Man-in-the-MiddleCAPEC-384Low
- Transaction or Event Tampering via Application API ManipulationCAPEC-385Medium
- Application API Navigation RemappingCAPEC-386Medium
ATT&CK techniques
- Access Token ManipulationT1134
- Access Token Manipulation:Token Impersonation/TheftT1134.001
- Steal Application Access TokenT1528
- Steal Web Session CookieT1539
- Use Alternate Authentication Material:Web Session CookieT1550.004
- Adversary-in-the-Middle: ARP Cache PoisoningT1557.002
- Compromise Infrastructure: DNS ServerT1584.002
Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- lists.apache.org/thread.html/r0556ce5db7231025785477739ee416b169d8aff5ee9bac7854d64736%40%3Cannounce.apache.org%3E
- lists.apache.org/thread.html/r06db4057b74e0598a412734f693a34a8836ac6f06d16d139e5e1027c%40%3Cdev.maven.apache.org%3E
- lists.apache.org/thread.html/r07a89b32783f73bda6903c1f9aadeb859e5bef0a4daed6d87db8e4a9%40%3Cissues.karaf.apache.org%3E
- lists.apache.org/thread.html/r08a401f8c98a99f68d061fde6e6659d695f28d60fe4f0413bcb355b0%40%3Ccommits.druid.apache.org%3E
- lists.apache.org/thread.html/r0a5e4ff2a7ca7ad8595d7683afbaeb3b8788ba974681907f97e7dc8e%40%3Cjira.kafka.apache.org%3E
- lists.apache.org/thread.html/r0d083314aa3934dd4b6e6970d1f6ee50f6eaa9d867deb2cd96788478%40%3Cjira.kafka.apache.org%3E
- lists.apache.org/thread.html/r167dbc42ef7c59802c2ca1ac14735ef9cf687c25208229993d6206fe%40%3Cissues.karaf.apache.org%3E
- lists.apache.org/thread.html/r2721aba31a8562639c4b937150897e24f78f747cdbda8641c0f659fe%40%3Cusers.kafka.apache.org%3E
- lists.apache.org/thread.html/r2ddabd06d94b60cfb0141e4abb23201c628ab925e30742f61a04d013%40%3Cissues.karaf.apache.org%3E
- lists.apache.org/thread.html/r30a139c165b3da6e0d5536434ab1550534011b1fdfcd2f5d95892c5b%40%3Cissues.karaf.apache.org%3E
- lists.apache.org/thread.html/r30e9fcba679d164158cc26236704c351954909c18cb2485d11038aa6%40%3Cdev.kafka.apache.org%3E
- lists.apache.org/thread.html/r340e75c9bb6e8661b89e1cf2c52f4638a18312e57bd884722bc28f52%40%3Cjira.kafka.apache.org%3E
- lists.apache.org/thread.html/r39fa6ec4b7e912d3e04ea68efd23e554ec9c8efa2c96f5b45104fc61%40%3Cjira.kafka.apache.org%3E
- lists.apache.org/thread.html/r3f0450dcab7e63b5f233ccfbc6fca5f1867a75c8aa2493ea82732381%40%3Cdev.jena.apache.org%3E
- lists.apache.org/thread.html/r4e1619cfefcd031fac62064a3858f5c9229eef907bd5d8ef14c594fc%40%3Cissues.karaf.apache.org%3E
- lists.apache.org/thread.html/r52c6cda14dc6315dc79e72d30109f4589e9c6300ef6dc1a019da32d4%40%3Cissues.karaf.apache.org%3E
- lists.apache.org/thread.html/r53cd5de57aaa126038c5301d8f518f3defab3c5b1c7e17c97bad08d8%40%3Cissues.karaf.apache.org%3E
- lists.apache.org/thread.html/r5ae6aaa8a2ce86145225c3516bb45d315c0454e3765d651527e5df8a%40%3Ccommits.kafka.apache.org%3E
- lists.apache.org/thread.html/r71bc13669be84c2ff45b74a67929bc2da905c152e12a39b406e3c2a0%40%3Cissues.karaf.apache.org%3E
Vendor advisories and official records. Exploit/PoC links are deliberately left out.