CVE-2025-61598

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 4.0

6.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-25)

CWE

CWE-524

Published

2025-10-28

Modified

2026-10-19

Record from

the NVD, synced 2026-10-19

Affected

• discourse:discourse

References

• https://github.com/discourse/discourse/commit/3ea1b663c82c067e5ca778db846bad1e082ba6cd
• https://github.com/discourse/discourse/commit/fd567af7bf5a15c70772021acbdf5d38487a31bc
• https://github.com/discourse/discourse/security/advisories/GHSA-jp9x-wwv6-cv3j

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