CVE-2026-41327: dgraph — Exploit & Fix

Description

Dgraph is an open source distributed GraphQL database. Prior to 25.3.3, a vulnerability has been found in Dgraph that gives an unauthenticated attacker full read access to every piece of data in the database. This affects Dgraph's default configuration where ACL is not enabled. The attack is a single HTTP POST to /mutate?commitNow=true containing a crafted cond field in an upsert mutation. The cond value is concatenated directly into a DQL query string via strings.Builder.WriteString after only a cosmetic strings.Replace transformation. No escaping, parameterization, or structural validation is applied. An attacker injects an additional DQL query block into the cond string, which the DQL parser accepts as a syntactically valid named query block. The injected query executes server-side and its results are returned in the HTTP response. This vulnerability is fixed in 25.3.3.

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CVSS v3.1 Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS — Exploit Prediction

0.0005

Probability of exploitation

0.16%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-943 CWE-943

Affected Products

Vendor	Product	Versions
dgraph	dgraph	< 25.3.3

References

Advisories & Patches

https://github.com/dgraph-io/dgraph/security/advisories/GHSA-mrxx-39g5-ph77 https://github.com/dgraph-io/dgraph/security/advisories/GHSA-mrxx-39g5-ph77

Exploits

https://github.com/dgraph-io/dgraph/security/advisories/GHSA-mrxx-39g5-ph77 https://github.com/dgraph-io/dgraph/security/advisories/GHSA-mrxx-39g5-ph77

Other References

https://github.com/dgraph-io/dgraph/releases/tag/v25.3.3

Frequently Asked Questions

What is CVE-2026-41327? +

Dgraph is an open source distributed GraphQL database. Prior to 25.3.3, a vulnerability has been found in Dgraph that gives an unauthenticated attacker full read access to every piece of data in the database. This affects Dgraph's default configuration where ACL is not enabled. The attack is a single HTTP POST to /mutate?commitNow=true containing a crafted cond field in an upsert mutation. The cond value is concatenated directly into a DQL query string via strings.Builder.WriteString after only a cosmetic strings.Replace transformation. No escaping, parameterization, or structural validation is applied. An attacker injects an additional DQL query block into the cond string, which the DQL parser accepts as a syntactically valid named query block. The injected query executes server-side and its results are returned in the HTTP response. This vulnerability is fixed in 25.3.3. It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2026-41327? +

CVE-2026-41327 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0005, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-41327? +

CVE-2026-41327 affects products from dgraph, specifically: dgraph. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-41327? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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