CASCACascade Atlas

Evidence dossier

CVE-2021-22205

An issue has been discovered in GitLab CE/EE affecting all versions starting from 11.9.

Exploited in the wild (CISA KEV since Nov 3, 2021). NVD reports CVSS 3.1 10.0. EPSS estimates 99.7% exploit likelihood as of Oct 21, 2026.

85.0–92.9Priority evidence range
Evidence through Oct 22, 2026, 6:07 PM UTC

As of Oct 22, 2026

Normalized restatement

An issue has been discovered in GitLab CE/EE affecting all versions starting from 11.9. GitLab was not properly validating image files that were passed to a file parser which resulted in a remote command execution.

State
PUBLISHED
Published
Apr 23, 2021
Updated
Aug 6, 2026
Evidence coverage
85%

Evidence chronology

What was known when

Download this view's receipt →
  1. Source dateSource date omittedFirst observed by CASCA
    CISA-ADP

    Record text: CISA ADP Vulnrichment

    Inspect raw assertion
    Field
    container
    Value
    CISA ADP Vulnrichment
    Original evidence ↗
  2. Source dateSource date omittedFirst observed by CASCA
    CVE Program

    Record text: CVE Program Container

    Inspect raw assertion
    Field
    container
    Value
    CVE Program Container
    Original evidence ↗
  3. Source dateSource date omittedFirst observed by CASCA
    GitLab

    Record text: An issue has been discovered in GitLab CE/EE affecting all versions starting from 11.9. GitLab was not properly validating image files that were passed to a file parser which resulted in a remote command execution.

    Inspect raw assertion
    Field
    container
    Value
    An issue has been discovered in GitLab CE/EE affecting all versions starting from 11.9. GitLab was not properly validating image files that were passed to a file parser which resulted in a remote command execution.
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: GitLab Community and Enterprise Editions Remote Code Execution Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    GitLab Community and Enterprise Editions Remote Code Execution Vulnerability
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 99.73% probability · 99.95th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.997310000000; percentile 0.999540000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Nov 3, 2021 · first observed Sep 1, 2026

Exploit likelihood99.73%

FIRST EPSS · score date Oct 21, 2026 · 100th percentile · first observed Oct 21, 2026

SeverityCVSS 10.0

NVD · CVSS 3.1 · first observed Aug 6, 2026 · same-version scores align in this snapshot

Evidence detail

Source limits and decisions

Why each evidence state has this value

casca-unknown-reasons-v1
Exploitation statusLast verified source snapshot retained

The last verified source boundary remains in force for this claim.

Revision
evidence-policy-v1.1.0
Cutoff
Oct 22, 2026
Resolution
Review source contract
Exploit likelihoodEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Oct 22, 2026
Resolution
None
Severity assessmentEvidence supported

Eligible evidence is present for this bounded claim.

Revision
casca-direct-cvss-eligibility-v1
Cutoff
Oct 22, 2026
Resolution
None
Affected productsSource-reported scope

The cited source assertion is retained while canonical product linkage remains open.

Revision
casca-factor-d-obligations-v1
Cutoff
Oct 22, 2026
Resolution
Resolve identity

Source comparison

Who said what

CISA-ADPIndependent enrichment
Record text

CISA ADP Vulnrichment

Inspect raw assertion
Field
container
Value
CISA ADP Vulnrichment
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CVE ProgramDerivative copy
Record text

CVE Program Container

Inspect raw assertion
Field
container
Value
CVE Program Container
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
GitLabOriginal assertion
Record text

An issue has been discovered in GitLab CE/EE affecting all versions starting from 11.9. GitLab was not properly validating image files that were passed to a file parser which resulted in a remote command execution.

Inspect raw assertion
Field
container
Value
An issue has been discovered in GitLab CE/EE affecting all versions starting from 11.9. GitLab was not properly validating image files that were passed to a file parser which resulted in a remote command execution.
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

GitLab Community and Enterprise Editions Remote Code Execution Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
GitLab Community and Enterprise Editions Remote Code Execution Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

99.73% probability · 99.95th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.997310000000; percentile 0.999540000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
6Underlying assertions
1Canonical products
6Target assertions
0Constraint assertions

Grouped from 1 configuration nodes in this exact snapshot. Visual grouping is navigational; asset exposure and root cause require cited evidence.

Identity source boundaries
  • Cpe dictionary1,775,266 records · observed through 2026-07-21T06:45:29.809Z27d65b0f-b718-4b4f-bb79-c47c68d09dfa
  • Cpe match643,502 records · observed through 2026-07-21T08:13:17.697Z955dae73-7302-438b-aee1-058d7cc5d48e

2 scope groups

GitLab · source assertedGitLabGitLabDirect source scope
Affected: >=11.9, <13.8.8Affected: >=13.9, <13.9.6Affected: >=13.10, <13.10.3
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": ">=11.9, <13.8.8"}, {"status": "affected", "version": ">=13.9, <13.9.6"}, {"status": "affected", "version": ">=13.10, <13.10.3"}]
NVD CPE · APPLICATIONgitlabgitlabVulnerable target · 6 assertions
Any version (unconstrained) (>= 11.9.0, < 13.8.8); Any version (unconstrained) (>= 13.10.0, < 13.10.3); Any version (unconstrained) (>= 13.9.0, < 13.9.6)Canonical identity product-c43557985c209f85ef702655504119f758c8528f04fe1423e88b00817f2efbafLinked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 4
    Logic
    OR
    Version bounds
    from including 13.10.0; through excluding 13.10.3
    Match ID
    ad03f460-6e1e-4504-b924-d416af98744b
  2. cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 3
    Logic
    OR
    Version bounds
    from including 13.9.0; through excluding 13.9.6
    Match ID
    c38714a5-8ae4-432e-b67b-99f393e1d566
  3. cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 1
    Logic
    OR
    Version bounds
    from including 11.9.0; through excluding 13.8.8
    Match ID
    e50a00d3-a0ca-4a2c-9863-df3fdd03598f
  4. cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    from including 11.9.0; through excluding 13.8.8
    Match ID
    01eafa19-205a-4512-9b97-cae6c5c9e150
  5. cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 2
    Logic
    OR
    Version bounds
    from including 13.9.0; through excluding 13.9.6
    Match ID
    2a6892fa-6192-48de-b3a6-e3992a95487d
  6. cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 5
    Logic
    OR
    Version bounds
    from including 13.10.0; through excluding 13.10.3
    Match ID
    58904c4b-e763-4870-921d-65d6a7f6a0af

Affected-product evidence

Accepted scope and product mapping

0 canonical links · 2 source-reported links

Source-reported scopeSource-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Vendor specified only by source · Product specified only by source

Source class
Direct cve affected
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Oct 22, 2026
Retained assertion IDs
6c063994-e55f-46df-aa48-3b0d147edd27
Source-reported scopeSource-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Vendor specified only by source · Product specified only by source

Source class
Nvd cpe vulnerable target
Assertions
6
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Oct 22, 2026
Retained assertion IDs
1d95582c-8b0e-4ba3-821a-907f761a08676e43cf5c-a251-4ff7-9265-644a7554fafa7054fabd-a4a3-448c-a1ba-a9c010dcf298d0acb6cd-5207-4cf5-bdf8-d212a8bd412bd71fd3d8-54c7-4d6f-acc2-c663d4805309ed7f2dee-ea8c-4c4b-bb1b-0a752f083e57

Assessments

CVSS by origin

10.0
NVDCVSS 3.1 · role Primary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
7.5
NVDCVSS 2.0 · role Primary · priority eligiblevalid_matchAV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
cve@gitlab.comCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10.0
GitLabCVSS 3.1 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Direct CVE/CNA normalized decisions

10.0Priority eligible

GitLab

CVSS 3.1 · Primary · Original assertion · rank 1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Validation
Valid match
Recomputed
10.0
Decision reason
Evidence supported
Policy
casca-direct-cvss-eligibility-v1

Assessments are retained side by side under closed precedence. Cascade never averages CVSS.

Evidence boundaries

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; remaining scope stays source-scoped.
  • NVD-carried upstream facts remain derivative; independent corroboration requires a separately authored source.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.
  • OSV aggregation and OSV-converted NVD material are not independent corroboration.
  • Red Hat facts are vendor assertions for the exact supplied products.
  • Nonmembership and not-yet-observed states are not proof of safety.