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 Jul 18, 2026.

85.0–92.9Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 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 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 ↗
  2. 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 0.999530000000
    Original evidence ↗
  3. 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 ↗
  4. 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 ↗
  5. 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 ↗
ExploitationCatalog member

CISA KEV · catalog date Nov 3, 2021 · first observed Jul 19, 2026

Exploit likelihood99.73%

FIRST EPSS · score date Jul 18, 2026 · 100th percentile · first observed Jul 19, 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 statusEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Aug 27, 2026
Resolution
None
Exploit likelihoodEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Aug 27, 2026
Resolution
None
Severity assessmentEvidence supported

Eligible evidence is present for this bounded claim.

Revision
casca-direct-cvss-eligibility-v1
Cutoff
Aug 27, 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
Aug 27, 2026
Resolution
Resolve identity

Source comparison

Who said what

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 0.999530000000
Source dateFirst observed by CASCAOriginal evidence ↗
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 ↗

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
Aug 27, 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
Aug 27, 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.