Medium 6.3Published Oct 28, 2025

CVE-2025-61598Discourse is missing Cache-Control response header on error responses

Updated under an hour ago (Oct 26, 2026, 2:40 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

Discourse is an open source discussion platform. Version before 3.6.2 and 3.6.0.beta2, default Cache-Control response header with value no-store, no-cache was missing from error responses. This may caused unintended caching of those responses by proxies potentially leading to cache poisoning attacks. This vulnerability is fixed in 3.6.2 and 3.6.0.beta2.

CVSS: 6.3 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-524
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 29, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

discourse discourse discourse:discourse (from the name)	before 3.6.2; from 3.6.0.beta1, < 3.6.0.beta2	CNA record
discourse discourse discourse:discourse	before 3.5.2; before 3.6.0; 3.6.0	NVD

References

https://github.com/discourse/discourse/security/advisories/GHSA-jp9x-wwv6-cv3jx-refsource-confirm, third-party-advisory
https://github.com/discourse/discourse/commit/3ea1b663c82c067e5ca778db846bad1e082ba6cdx-refsource-misc, patch
https://github.com/discourse/discourse/commit/fd567af7bf5a15c70772021acbdf5d38487a31bcx-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.