How severe is CVE-2026-35173?

CVE-2026-35173 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-35173 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35173?

CVE-2026-35173 affects Chyrplite Chyrp Lite. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35173?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-35173 have an EU (EUVD) identifier?

Yes. CVE-2026-35173 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19420.

When was CVE-2026-35173 published?

CVE-2026-35173 was published on 2026-04-06 and last updated on 2026-06-17.

CVE-2026-35173

CVE-2026-35173 is a medium-severity vulnerability in Chyrplite Chyrp Lite with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-639.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19420
Weakness: CWE-639
Affected product: Chyrplite Chyrp Lite
Published: 2026-04-06
Last modified: 2026-06-17

Description

Chyrp Lite is an ultra-lightweight blogging engine. Prior to 2026.01, an IDOR / Mass Assignment issue exists in the Post model that allows authenticated users with post editing permissions (Edit Post, Edit Draft, Edit Own Post, Edit Own Draft) to modify posts they do not own and do not have permission to edit. By passing internal class properties such as id into the post_attributes payload, an attacker can alter the object being instantiated. As a result, further actions are performed on another user’s post rather than the attacker’s own post, effectively enabling post takeover. This vulnerability is fixed in 2026.01.

Frequently asked questions

What is CVE-2026-35173?: Chyrp Lite is an ultra-lightweight blogging engine. Prior to 2026.01, an IDOR / Mass Assignment issue exists in the Post model that allows authenticated users with post editing permissions (Edit Post, Edit Draft, Edit Own Post, Edit Own Draft) to modify posts they do not own and do not have permission to edit. By passing internal class properties such as id into the post_attributes payload, an attacker can alter the object being instantiated. As a result, further actions are performed on another user’s post rather than the attacker’s own post, effectively enabling post takeover. This vulnerability is fixed in 2026.01.
How severe is CVE-2026-35173?: CVE-2026-35173 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-35173 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35173?: CVE-2026-35173 affects Chyrplite Chyrp Lite. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35173?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-35173 have an EU (EUVD) identifier?: Yes. CVE-2026-35173 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19420.
When was CVE-2026-35173 published?: CVE-2026-35173 was published on 2026-04-06 and last updated on 2026-06-17.

References

https://github.com/xenocrat/chyrp-lite/security/advisories/GHSA-8c3h-rh2j-fxr9

Affected products (1)

cpe:2.3:a:chyrplite:chyrp_lite:*:*:*:*:*:*:*:*

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